JP5561140B2 - Communication system and communication method - Google Patents

Description

  The present invention relates to a communication system including an electronic timepiece and an electronic device in which hands are driven by a stepping motor, and a communication method therefor.

  Conventionally, a system that performs data communication between a wristwatch and a mobile phone using, for example, a Bluetooth (registered trademark) communication module has been proposed (for example, Patent Documents 1 and 2).

JP 2002-152327 A JP 2002-223475 A

  When wireless communication is performed with an electronic timepiece that drives a pointer with a stepping motor, if a radio wave transmission / reception timing overlaps with a hand movement timing, a communication error may occur due to electromagnetic noise accompanying the movement of the hands. Further, the driving of the stepping motor may be affected by the relatively large power consumption required for transmission / reception of radio waves.

  Some electronic timepieces have various hand movement cycles. For example, a normal time display mode in which the second hand is moved every second, a fast feed mode in which a plurality of hands are driven at 32 pps (pulse per second) or 16 pps, and the second hand is stopped to indicate predetermined information, while the time display Therefore, the driving cycle is switched variously, such as a specific function mode in which the minute hand is moved every 10 seconds and the hour hand is moved every 2 minutes.

  An object of the present invention is to efficiently communicate in a communication system that performs wireless communication between an electronic timepiece and an electronic device by avoiding that the hand movement timing of the electronic timepiece and the transmission / reception timing of communication data easily overlap. An object of the present invention is to provide a communication system and a communication method capable of transmitting and receiving data.

In order to achieve the above object, the invention according to claim 1
In a communication system including an electronic timepiece that drives a pointer by a stepping motor and an electronic device that performs wireless communication with the electronic timepiece,
The electronic device is
First wireless communication means for performing wireless communication;
When the communication data is transmitted to the electronic timepiece by the first wireless communication means, the communication data is divided into divided data having a data amount corresponding to the driving interval of the hands, and the divided data is divided into the driving periods of the hands. A split transmission means for transmitting during the removed period,
The electronic timepiece is
Second wireless communication means for performing wireless communication with the electronic device;
And a division receiving means for receiving the divided data transmitted from the electronic device over a plurality of times by the second wireless communication means during a period outside the driving period of the pointer. Yes.

The invention described in claim 2 is the communication system according to claim 1,
The electronic device is
An interval confirmation unit for confirming the driving interval of the pointer while the divided data is transmitted a plurality of times by the divided transmission unit;
The divided transmission means includes
When the driving interval of the pointer confirmed by the interval confirmation unit is changed, the divided data is separated from the communication data by changing the data amount of the divided data according to a new driving interval. It is a feature.

The invention according to claim 3 is the communication system according to claim 2,
The electronic device is
Notification request means for requesting the electronic timepiece a drive notification signal indicating that the hands have been driven;
Notification receiving means for receiving the drive notification signal from the electronic timepiece by the first wireless communication means;
With
The interval confirmation means of the electronic device is
Check the driving interval of the pointer based on the received drive notification signal,
The electronic timepiece is
It is characterized by comprising a notification transmitting means for transmitting the drive notification signal to the electronic apparatus by the second wireless communication means in response to a request from the electronic apparatus.

The invention according to claim 4
In a communication method for performing data communication between an electronic device having a first wireless communication means and an electronic timepiece having a second wireless communication means while driving a pointer by a stepping motor,
When transmitting communication data from the electronic device to the electronic timepiece, the control unit of the electronic device divides the communication data into divided data having a data amount corresponding to the driving interval of the hands; and
A transmitting step in which the first wireless communication means of the electronic device transmits the divided data separated by the dividing step in a period that excludes the driving period of the pointer;
A divided reception step in which the second wireless communication means of the electronic timepiece receives the divided data transmitted from the electronic device over a plurality of times during a period outside the driving period of the hands;
It is characterized by including.

The invention according to claim 5 is the communication method according to claim 4,
While the divided data is transmitted a plurality of times by the dividing step and the transmitting step, the electronic device control means includes an interval confirming step for confirming the driving interval of the hands,
The dividing step includes
When the driving interval of the pointer confirmed in the interval confirmation step is changed, the divided data is separated from the communication data by changing the data amount of the divided data according to a new driving interval. It is a feature.

The invention according to claim 6 is the communication method according to claim 5,
A notification requesting step for requesting the electronic timepiece a drive notification signal indicating that the control means of the electronic device has driven the hands;
A notification receiving step in which the first wireless communication means of the electronic device receives the drive notification signal from the electronic timepiece;
A notification transmission step in which the second wireless communication means of the electronic timepiece transmits the drive notification signal to the electronic device in response to a request from the electronic device;
Including
The interval confirmation step includes:
The driving interval of the pointer is confirmed based on the driving notification signal received in the notification receiving step.

  According to the present invention, communication data is divided by the amount of data according to the driving interval of the pointer, and the divided data thus divided is transmitted and received during a period outside the driving period of the pointer. Communication data can be efficiently transmitted and received without easily overlapping.

1 is a block diagram illustrating an overall configuration of an electronic timepiece according to an embodiment of the present invention. It is a block diagram which shows the whole structure of the communication terminal which is embodiment of the electronic device which concerns on this invention. It is the time chart which showed the communication sequence (a) of an electronic timepiece and a communication terminal, and the hand movement timing (b) of an electronic timepiece. It is a flowchart which shows the control procedure of the division | segmentation reception process performed by CPU of an electronic timepiece. It is a flowchart which shows the control procedure of the division | segmentation transmission process performed by CPU of a communication terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 and FIG. 2 are block diagrams respectively showing the overall configuration of the electronic timepiece 40 and the communication terminal 10 as an electronic device that constitute the communication system of this embodiment.

  The communication system according to this embodiment includes a communication terminal 10 such as a mobile phone capable of wireless communication, and an electronic timepiece 40 worn on the wrist. The communication terminal 10 and the electronic timepiece 40 each have a short-range wireless communication function, and communication data can be transmitted and received by wireless signals in a state where communication connection is established. By such communication, for example, when there is an incoming voice call or mail incoming to the communication terminal 10, the notification data is transmitted to the electronic timepiece 40 to notify the user of the incoming call, or the communication terminal 10 Correct time data is transmitted to the electronic timepiece 40 to correct the time of the electronic timepiece 40, information downloaded by the communication terminal 10 from the communication network is transmitted to the electronic timepiece 40, and related display output is performed. Various linkage functions are realized.

  As shown in FIG. 1, the electronic timepiece 40 includes a CPU (Central Processing Unit) 41 that performs overall control of the device, and a ROM (Read Only Memory) 42 that stores a control program executed by the CPU 41 and control data. , A RAM (Random Access Memory) 43 that supplies a working memory space to the CPU 41, a switch 44 for a user to perform an operation input from the outside, a clock circuit 45 that clocks the current time, and a front part of the wristwatch body A liquid crystal display (LCD) 46 provided for displaying time and various functions, a liquid crystal driver 47 for driving the liquid crystal display 46, and a Bluetooth module (first) for performing short-range wireless communication via an antenna AN41. (2 wireless communication means) 48 and data processing such as serial / parallel conversion for data transmitted / received via the Bluetooth module 48. A UART (Universal Asynchronous Receiver Transmitter) 49 that performs notification, a vibration motor 50 that notifies the user by vibration and its driver 51, a light emitting diode 52 that notifies the user by flashing light and the like, and a driver 53 thereof, and a buzzer sound A piezo element 54 and a driver 55 for performing alarm notification, a plurality of hands (for example, a second hand, a minute hand, and an hour hand) 59 that rotate to display time and the like, and a plurality of motors that drive the plurality of hands 59 (for example, a first hand) 1 to 3rd motor) 56 and its driver 57, a gear train mechanism 58 for transmitting the rotational motion of the plurality of motors 56 to the plurality of hands 59, a bus 60 for exchanging signals between the CPU 41 and each part, and the like. I have.

  The plurality of motors 56 are stepping motors that each receive a pulsed drive signal and rotate by a predetermined angle (for example, 180 °).

  The ROM 42 displays, as a control program, a pointer control processing program for rotating the hands 59 to display time and other information, and various information linked to the communication terminal 10 by the liquid crystal display unit 46 or a notification unit ( 50, 52, 54) and the like, and the division reception processing program for receiving data from the communication terminal 10 while avoiding the hand movement timing as much as possible are stored. The divided reception processing program and the CPU 41 executing the divided reception program constitute a divided reception unit.

  In the above-mentioned pointer control processing, among the plurality of hands 59, a normal time display mode in which the second hand moves the minute hand every second for 10 seconds and the hour hand every 2 minutes, fast-forward mode for driving the hands 59 at high speed, The drive mode is switched according to a predetermined condition such as a specific function mode in which the second hand is stopped to indicate other information and the normal time is displayed with the minute hand and hour hand, so that the needle moving speed of the earliest pointer 59 changes accordingly. It has become.

  As shown in FIG. 2, the communication terminal 10 includes a CPU 11 that performs overall control of the device, a ROM 12 that stores a control program and control data executed by the CPU 11, and a RAM 13 that supplies a working memory space to the CPU 41. The operation unit 14 having a plurality of operation keys, a liquid crystal display unit (LCD) 15 for displaying various functions and its display driver 16, a speaker 17 and a microphone 18 for inputting / outputting voice during a call, are input / output. A codec 19 that performs mutual conversion between a voice signal and digital data, an RF transmission / reception circuit 20 that transmits / receives a radio signal to / from a base station via an antenna AN11, and a digital voice signal that is input / output from / to the codec 19. Short-distance wireless communication via a communication circuit 21 that performs modulation and demodulation processing of data and various transmission / reception data, and an antenna AN12 Bluetooth module (first wireless communication means) 22 that performs communication, UART 23 that performs data processing such as serial / parallel conversion on data transmitted / received via Bluetooth module 22, and vibration that notifies an incoming call by vibration The motor 24 and its driver 25, and a bus 26 for exchanging signals between the CPU 11 and each unit are provided.

  The ROM 12 stores, as a control program, a main control processing program that realizes various functions of the mobile phone, a divided transmission processing program that transmits data to the electronic timepiece 40 while avoiding the timing of moving hands as much as possible, and the like. . The divided transmission processing program and the CPU 11 that executes this program constitute divided transmission means and control means.

  Next, a communication operation via the Bluetooth modules 48 and 22 performed between the communication terminal 10 and the electronic timepiece 40 will be described.

  FIG. 3 shows a time chart showing the communication sequence (a) between the electronic timepiece 40 and the communication terminal 10 and the hand movement timing (b) of the electronic timepiece 40. FIG. 3B shows a hand movement period in which the motor 56 is driven by a round dot.

  In the communication system of this embodiment, as shown in FIGS. 3A and 3B, when transmitting relatively large communication data from the communication terminal 10 to the electronic timepiece 40, the hand movement timing and the data communication are transmitted. The communication data is divided for each data amount according to the hand movement interval of the electronic timepiece 40 so that the transmission / reception timing of the electronic timepiece 40 does not easily overlap, and the divided data thus divided is transmitted / received multiple times during the period between the hands. I will do it.

The data amount of the divided data is determined as follows. That is, if the minimum data movement interval of the electronic timepiece 40 is 1 second and the amount of data that can be transmitted in the period between the movements is α (bytes) and the current movement interval is 1 / x second, the period between the movements The amount of data β (bytes) that can be transmitted to is obtained as in the following equation (1).
β = α / x (1)

  As described above, by dividing the communication data into the data amount corresponding to the hand movement interval and transmitting the communication data a plurality of times, even when communication data with a large data amount is transmitted, the hand movement timing and the transmission / reception timing do not overlap. Can be processed as follows.

  Further, in the communication system of this embodiment, as shown in FIG. 3A, while the divided data is transmitted a plurality of times, the communication terminal 10 performs a process of confirming the hand movement interval of the electronic timepiece 40, When the hand movement interval is changed, the data amount for dividing the communication data is switched to the data amount corresponding to the new hand movement interval, and the divided data is sent during the period between the hand movements.

  Specifically, processing for confirming the hand movement interval is performed as follows. First, the communication terminal 10 transmits a motor OUT signal confirmation request to the electronic timepiece 40. This confirmation request is repeatedly output at short time intervals until a response from the electronic timepiece 40 is received so that the electronic timepiece 40 can be normally received.

  When receiving the confirmation request, the electronic timepiece 40 outputs a drive signal to the motor 56 and transmits a motor OUT signal indicating that the hand movement has been performed to the communication terminal 10 at the next hand movement and at the next hand movement. .

  The communication terminal 10 confirms the current hand movement interval by measuring these time intervals from the two motor OUT signals representing the two hand movements sent as described above.

  As shown in the timing T1 in FIG. 3, the interval between the motor OUT signals transmitted from the electronic timepiece 40 to the communication terminal 10 is narrowed by the confirmation process of the hand movement interval as shown at the timing T1 in FIG. Thus, it is confirmed by the communication terminal 10 that the hand movement interval is narrowed. As a result, the amount of data from which the communication data is divided in the communication terminal 10 is set to be small, and the divided data having a small amount of data is transmitted to the electronic timepiece 40 during the period between the hands.

  Communication data is efficiently transmitted from the communication terminal 10 to the electronic timepiece 40 so that the movement timing and the transmission / reception timing of the communication data do not easily overlap with each other by the divided transmission of the communication data and the confirmation processing of the movement interval. Is to be sent. Furthermore, even when the hand movement interval is changed by the electronic timepiece 40, the communication data is efficiently sent by appropriately changing the data amount for dividing the communication data in accordance with this change.

  Next, control processing of the electronic timepiece 40 and the communication terminal 10 that realizes the above communication operation will be described in detail based on a flowchart.

  FIG. 4 shows a flowchart of the divided reception process executed by the CPU 41 of the electronic timepiece 40 during the communication process.

  This divided reception process is executed in parallel with other processes such as a pointer control process and a display control process by the CPU 41 of the electronic timepiece 40 when a communication data reception request is generated. The divided reception process is started in a state in which the Bluetooth module 48 of the electronic timepiece 40 and the Bluetooth module 22 of the communication terminal 10 are connected for communication and can communicate with each other wirelessly.

  When this divided reception process is started, the CPU 41 of the electronic timepiece 40 mainly transmits a motor OUT signal in response to a communication data reception process transmitted from the communication terminal 10 and a confirmation request from the communication terminal 10. Repeat the process.

  That is, first, the CPU 41 confirms the status of the pointer control process to determine whether or not the hand is currently moving (step S1), and if the hand is being moved, repeats the confirmation process of step S1 and waits. This is to prevent data reception and reception of a confirmation request from the communication terminal 10 during hand movement.

  If it is determined that the hand is not currently moving, the CPU 41 confirms whether the Bluetooth module 48 is communicating data with the communication terminal 10 (receiving divided data) (step S2). Until the reception of the data is completed, the process (data reception) of taking the divided data received by the Bluetooth module 48 from the reception buffer into the RAM 43 is performed (step S3). Then, when reception of one piece of divided data is completed, the process proceeds to the next. On the other hand, if it is determined in the confirmation process in step S2 that data communication is not being performed, the process proceeds as it is.

  Next, the CPU 41 confirms whether or not the Bluetooth module 48 has received a confirmation request for the motor OUT signal from the communication terminal 10 (step S4), and if not received, returns to step S1. On the other hand, if it has been received, the motor OUT signal (drive notification signal) indicating that the motor 56 has been driven is transmitted to the communication terminal 10 via the Bluetooth module 48 at the next time and the next two hand movements ( Step S5: Notification transmission means). When the motor OUT signal is transmitted twice, the process returns to step S1. And the process from said step S1 is repeated.

  By such divided reception processing, the communication operation of the electronic timepiece 40 that performs the response to the confirmation request and the reception of the divided data shown in FIG. 3 is realized.

  FIG. 5 shows a flowchart of the divided transmission process executed by the CPU 11 of the communication terminal 10 during the communication process.

  This divided transmission process is a process executed in parallel with the main control process of the communication terminal 10 when a request for transmitting communication data having a relatively large amount of data to the electronic timepiece 40 occurs. The divided transmission process is started in a state in which the Bluetooth module 48 of the electronic timepiece 40 and the Bluetooth module 22 of the communication terminal 10 are connected for communication and can communicate with each other wirelessly.

  When this divided transmission process is started, first, the CPU 11 of the communication terminal 10 transmits a motor OUT signal confirmation request in order to obtain the hand movement interval of the electronic timepiece 40 (interval at which the drive signal is output to the motor terminal). (Step S11: Notification request means). Then, it is confirmed whether there is a response from the electronic timepiece 40 on the receiving side (step S12). If there is a response, the process proceeds to the next, but if there is no response, the process returns to step S11 to send a confirmation request and confirm the response. repeat.

  As a result, when there is a response from the electronic timepiece 40 and the next process proceeds, the first motor OUT signal sent from the electronic timepiece 40 is received (step S13: notification receiving means), and time measurement is started (step S13). S14). Further, it waits for and receives the second motor OUT signal (step S15: notification receiving means), and when it is received, the time measurement is terminated (step S16).

  Subsequently, based on the measurement result of the time interval in step S16, the speed (hand movement interval) of the motor of the electronic timepiece 40 is calculated (step S17). Further, based on the calculated hand movement interval, the data amount “β” of the divided data that can be transmitted in the hand movement interval is calculated (step S18). As described above, the data amount “β” is a value obtained by dividing the data amount “α” that can be transmitted at a one second movement interval by the movement speed “x (pps; pulses per second)”. An interval confirmation unit is configured by the processing of steps S11 to S17.

  When the data amount “β” of the divided data is calculated, it is checked whether the motor OUT signal is transmitted immediately before the communication, that is, whether the hand movement operation is not performed immediately before the communication (step S19). ). As a result, if the motor OUT signal is not transmitted, the divided data having the data amount “β” is separated from the communication data and transmitted to the electronic timepiece 40 via the Bluetooth module 22 (step S20: division step, transmission step). . Subsequently, the data amount “β” for the current transmission is subtracted from the remaining data communication amount “z” (step S21), and it is determined whether the remaining data communication amount “z” after subtraction has become zero (step S22). ). On the other hand, if transmission of the motor OUT signal is confirmed in the confirmation process in step S19, the process jumps to step S22 without executing the processes in steps S20 and S21.

  If the remaining data communication total amount “z” is not zero as a result of the determination process in step S22, the process returns to step S11 and the process from step S11 is repeated again. By repeating this, the divided data is transmitted a plurality of times during the period between the hands. Then, if the remaining data communication total amount “z” is zero, this divided transmission processing is terminated.

  By such divided transmission processing, the communication operation of the communication terminal 10 that performs the confirmation of the hand movement interval and the transmission of the divided data shown in FIG. 3 is realized.

  As described above, according to the electronic timepiece 40 and the communication terminal 10 of this embodiment, when transmitting / receiving communication data having a relatively large amount of data, the communication terminal 10 adjusts the communication data to the hand movement interval of the electronic timepiece 40. It is divided into the data amount and transmitted during the period between the hands. Therefore, the hand movement timing and the communication data transmission / reception timing do not easily overlap, and the communication data can be efficiently transmitted / received.

  The communication terminal 10 also checks the hand movement interval of the electronic timepiece 40 while transmitting the communication data a plurality of times, and when the hand movement interval is changed, the data amount is adjusted to the new hand movement interval. The communication data is segmented and the segmented data segmented is transmitted. Therefore, even when the hand movement interval is changed during transmission of communication data, it is possible to appropriately cope with it.

  Further, the confirmation of the hand movement interval by the communication terminal 10 is executed as follows. That is, a confirmation request is transmitted from the communication terminal 10 to the electronic timepiece 40, and the motor OUT signal is transmitted to the communication terminal 10 when the electronic timepiece 40 continues to move twice based on this confirmation request. The communication terminal 10 confirms the hand movement interval. Therefore, the actual hand movement interval can be confirmed with certainty.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above embodiment, the data amount “β” for dividing communication data according to the hand movement interval is a value obtained by dividing the data amount “α” suitable for one second hand movement by the hand movement speed “x”. It is not limited. For example, if electromagnetic noise is generated even during a predetermined margin period from the timing of movement and it is necessary to avoid transmission / reception of communication data, the amount of data that can be transmitted during the period excluding this margin period is divided into divided data. What is necessary is just to comprise so that it may calculate as a data amount of.

  In the above embodiment, the hand movement interval is confirmed by the request and response of the motor OUT signal representing the hand movement. For example, data representing the hand movement interval is sent from the electronic timepiece to the electronic device to confirm the hand movement interval. When the hand movement interval is changed, data indicating this change may be sent to the electronic device to notify the change of the hand movement interval.

  In the above embodiment, every time divided data is transmitted once, the confirmation request and the motor OUT signal are exchanged to confirm the hand movement interval. For example, every time divided data is transmitted a plurality of times. It is also possible to confirm the hand movement interval. In such a configuration, when the hand movement interval is changed, it becomes impossible to respond to this change until the next hand movement interval is confirmed. Since one piece of divided data can be transmitted, the communication data can be efficiently transmitted when the amount of communication data is large and the frequency of changing the hand movement interval is low, which is effective.

  In the above embodiment, an example in which the present invention is applied to communication between an electronic timepiece worn on an arm and a communication terminal (mobile phone) is shown. However, the electronic timepiece is a device that drives a pointer with a stepping motor. If so, a table clock may be applied, and various devices such as a computer and a digital camera can be applied as the electronic device of the communication partner.

  Further, although the Bluetooth module is exemplified as the wireless communication means, the communication method is not particularly limited. In addition, the detailed configuration and the detailed method specifically shown in the embodiments can be appropriately changed without departing from the spirit of the invention.

10 Communication terminal 11 CPU
12 ROM
13 RAM
14 Operation Unit 22 Bluetooth Module 40 Electronic Clock 41 CPU
42 ROM
43 RAM
44 switch 45 timing circuit 48 Bluetooth module 56 motor 58 train wheel mechanism 59 pointer

Claims (6)

In a communication system including an electronic timepiece that drives a pointer by a stepping motor and an electronic device that performs wireless communication with the electronic timepiece,
The electronic device is
First wireless communication means for performing wireless communication;
When the communication data is transmitted to the electronic timepiece by the first wireless communication means, the communication data is divided into divided data having a data amount corresponding to the driving interval of the hands, and the divided data is divided into the driving periods of the hands. A split transmission means for transmitting during the removed period,
The electronic timepiece is
Second wireless communication means for performing wireless communication with the electronic device;
And a division receiving unit that receives the divided data transmitted from the electronic device during a period excluding the driving period of the pointer by the second wireless communication unit a plurality of times. Communication system. The electronic device is
An interval confirmation unit for confirming the driving interval of the pointer while the divided data is transmitted a plurality of times by the divided transmission unit;
The divided transmission means includes
When the driving interval of the pointer confirmed by the interval confirmation unit is changed, the divided data is separated from the communication data by changing the data amount of the divided data according to a new driving interval. The communication system according to claim 1. The electronic device is
Notification request means for requesting the electronic timepiece a drive notification signal indicating that the hands have been driven;
Notification receiving means for receiving the drive notification signal from the electronic timepiece by the first wireless communication means;
With
The interval confirmation means of the electronic device is
Check the driving interval of the pointer based on the received drive notification signal,
The electronic timepiece is
The communication system according to claim 2, further comprising notification transmission means for transmitting the drive notification signal to the electronic apparatus by the second wireless communication means in response to a request from the electronic apparatus. In a communication method for performing data communication between an electronic device having a first wireless communication means and an electronic timepiece having a second wireless communication means while driving a pointer by a stepping motor,
When transmitting communication data from the electronic device to the electronic timepiece, the control unit of the electronic device divides the communication data into divided data having a data amount corresponding to the driving interval of the hands; and
A transmitting step in which the first wireless communication means of the electronic device transmits the divided data separated by the dividing step in a period that excludes the driving period of the pointer;
A divided reception step in which the second wireless communication means of the electronic timepiece receives the divided data transmitted from the electronic device over a plurality of times during a period outside the driving period of the hands;
A communication method comprising: While the divided data is transmitted a plurality of times by the dividing step and the transmitting step, the electronic device control means includes an interval confirming step for confirming the driving interval of the hands,
The dividing step includes
When the driving interval of the pointer confirmed in the interval confirmation step is changed, the divided data is separated from the communication data by changing the data amount of the divided data according to a new driving interval. The communication method according to claim 4, wherein: A notification requesting step for requesting the electronic timepiece a drive notification signal indicating that the control means of the electronic device has driven the hands;
A notification receiving step in which the first wireless communication means of the electronic device receives the drive notification signal from the electronic timepiece;
A notification transmission step in which the second wireless communication means of the electronic timepiece transmits the drive notification signal to the electronic device in response to a request from the electronic device;
Including
The interval confirmation step includes:
6. The communication method according to claim 5, wherein the driving interval of the pointer is confirmed based on the driving notification signal received in the notification receiving step.

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