JP2018056778A - COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND PROGRAM - Google Patents

Abstract

When a communication connection is disconnected due to deterioration of radio wave conditions, subsequent reconnection is effectively performed. A mobile terminal includes a communication unit, a communication management unit, and a communication control unit. When the communication unit 20-1 receives a predetermined wireless signal emitted by another device, the communication unit 20-1 shifts to a communication connection state with the other device, and determines that wireless communication is not possible in this communication connection state. In this case, the communication connection is disconnected and the communication connection is released. When the communication connection by the communication unit 20-1 is disconnected, the communication management unit 51 records the disconnection history. When the communication control unit 52 receives a radio signal emitted by another device, the communication control unit 52 establishes a communication connection state with the other device by the communication unit 20-1 based on the disconnection history recorded by the communication management unit 51. Control the transition to [Selection] Figure 3

Description

  The present invention relates to a communication control device, a communication control method, and a program.

  2. Description of the Related Art Conventionally, in an imaging system that controls an imaging apparatus with a wireless signal from a controller, a technique for detecting a transmission quality state of a wireless signal and notifying a user is known (see Patent Document 1).

JP 2006-287407 A

  However, in the above prior art, when the communication connection is unintentionally disconnected due to the deterioration of the radio wave condition or the like, the subsequent reconnection cannot be effectively performed.

  The present invention has been made in view of such a situation, and when the communication connection is unintentionally disconnected due to deterioration of the radio wave condition, the subsequent reconnection is effectively performed. Objective.

In order to achieve the above object, a communication control apparatus according to an aspect of the present invention includes:
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication means for shifting to a communication connection release state,
A disconnection history recording unit that records a disconnection history when the communication connection by the wireless communication unit is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording unit, the transition to the communication connection state with the other device by the wireless communication unit is controlled. Control means;
It is provided with.

  According to the present invention, when the communication connection is unintentionally disconnected due to deterioration of the radio wave condition or the like, the subsequent reconnection can be effectively performed.

It is a system configuration figure showing the system configuration of communication system S concerning one embodiment of the present invention. It is a block diagram which shows the structure of the hardware of the portable terminal 1 and the imaging device 2 which concern on one Embodiment of this invention. It is a flowchart explaining the flow of the reconnection process after the mode setting process (mode update process) and communication connection which the portable terminal 1 of FIG. 2 which has the functional structure of FIG. 3 performs. It is a flowchart explaining the flow of the mode setting process (mode update process) which the portable terminal 1 of FIG. 2 which has the functional structure of FIG. 3 performs. 4 is a flowchart for explaining a flow of reconnection processing after disconnection of communication connection executed by the mobile terminal 1 of FIG. 2 having the functional configuration of FIG. 3. 2 is a schematic diagram for explaining an operation example of a communication system S. FIG.

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

FIG. 1 is a system configuration diagram showing a system configuration of a communication system S according to an embodiment of the present invention.
As illustrated in FIG. 1, the communication system S includes a mobile terminal 1 and an imaging device 2.
The mobile terminal 1 has at least a communication function for performing short-range wireless communication with the imaging device 2.
The imaging device 2 has at least a photographing function and a communication function for performing short-range wireless communication with the mobile terminal 1.

  In this embodiment, short-range wireless communication is BLE (Bluetooth (registered trademark) Low Energy) communication, in which the mobile terminal 1 functions as a central in BLE connection, and the imaging device 2 functions as a peripheral in BLE connection.

  In the communication system S, the communication function can be maintained even when the main power supply of the imaging device 2 is turned off, and the connection processing is performed by the portable terminal 1 responding to the advertising signal transmitted by the imaging device 2. Start. In response to a response from the mobile terminal 1, the imaging device 2 performs a connection process with the mobile terminal 1, and when the main power other than the communication function is in the off state, the main power is automatically turned on and the imaging is performed. Startup processing (initialization processing, preparation processing for photographing, etc.) of the apparatus 2 is performed. Then, processing such as photographing is automatically executed according to the operation mode. That is, the imaging apparatus 2 is configured such that the connection process and the subsequent predetermined process are automatically performed when the mobile terminal 1 enters the communication range.

  In such a communication system S, when the communication state is unstable and connection and disconnection are repeated, connection processing and start-up processing (or processing such as shooting) are also repeatedly performed, and extra power is consumed. become. Therefore, in consideration of the power consumption of the imaging device 2, in a state where the communication state is stable (hereinafter referred to as “connection stable state”), a response from the mobile terminal 1 is performed, for example, moving within and outside the communication range. In a state where the communication state that occurs in such a case is not stable (hereinafter referred to as “connection unstable state”), a response from the mobile terminal 1 is not performed. Since there is no response from the portable terminal 1, the imaging device 2 assumes that the portable terminal 1 does not exist within the communication range, the connection process is not executed, and other functions are started after the connection process. Therefore, power consumption can be reduced.

FIG. 2 is a block diagram illustrating a hardware configuration of the mobile terminal 1 and the imaging device 2 according to an embodiment of the present invention.
The mobile terminal 1 is configured as a tablet terminal, for example.

  As shown in FIG. 2, the mobile terminal 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input / output interface 15, and an imaging device. A unit 16, an input unit 17, an output unit 18, a storage unit 19, a communication unit 20, and a drive 21 are provided.

  The CPU 11 executes various processes according to a program recorded in the ROM 12 or a program loaded from the storage unit 19 to the RAM 13.

  The RAM 13 appropriately stores data necessary for the CPU 11 to execute various processes.

  The CPU 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output interface 15 is also connected to the bus 14. An imaging unit 16, an input unit 17, an output unit 18, a storage unit 19, a communication unit 20, and a drive 21 are connected to the input / output interface 15.

  Although not shown, the imaging unit 16 includes an optical lens unit and an image sensor.

The optical lens unit is configured by a lens that collects light, for example, a focus lens or a zoom lens, in order to photograph a subject.
The focus lens is a lens that forms a subject image on the light receiving surface of the image sensor. The zoom lens is a lens that freely changes the focal length within a certain range.
The optical lens unit is also provided with a peripheral circuit for adjusting setting parameters such as focus, exposure, and white balance as necessary.

The image sensor includes a photoelectric conversion element, AFE (Analog Front End), and the like.
The photoelectric conversion element is composed of, for example, a CMOS (Complementary Metal Oxide Semiconductor) type photoelectric conversion element or the like. A subject image is incident on the photoelectric conversion element from the optical lens unit. Therefore, the photoelectric conversion element photoelectrically converts (captures) the subject image, accumulates the image signal for a predetermined time, and sequentially supplies the accumulated image signal as an analog signal to the AFE.
The AFE performs various signal processing such as A / D (Analog / Digital) conversion processing on the analog image signal. Through various signal processing, a digital signal is generated and output as an output signal of the imaging unit 16.
Hereinafter, the output signal of the imaging unit 16 is referred to as “captured image data”. Data of the captured image is appropriately supplied to the CPU 11 or an image processing unit (not shown).

The input unit 17 includes various buttons and the like, and inputs various types of information according to user instruction operations.
The output unit 18 includes a display, a speaker, and the like, and outputs images and sounds.
The storage unit 19 is composed of a hard disk, a DRAM (Dynamic Random Access Memory), or the like, and stores various image data.
The communication unit 20 is configured by a wireless IC module or the like, and controls communication with an external device (in the present embodiment, the portable terminal 1 or the imaging device 2) using a communication method based on the BLE communication standard. Note that the imaging apparatus 2 is configured to be able to turn off the power other than the communication unit 20. That is, although not shown, the power supply unit of the imaging device 2 is independent of a sub power source that is a power source for causing the communication unit 20 to function and a main power source that is a power source for causing main parts other than the communication unit 20 to function. And can be turned on and off separately. When communication with another device is established by the communication unit 20 with only the sub power supply turned on, the main power supply is automatically turned on by a power ON signal output from the communication unit 20 to the main power supply unit. Can be configured.

  A removable medium 31 made of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately attached to the drive 21. The program read from the removable medium 31 by the drive 21 is installed in the storage unit 19 as necessary. The removable medium 31 can also store various data such as image data stored in the storage unit 19 in the same manner as the storage unit 19.

The imaging device 2 is configured by a digital camera, for example.
The imaging device 2 includes a CPU 11 or a removable medium 31. Since the hardware configuration of the portable terminal 1 is the same as the hardware configuration of the imaging device 2, the description thereof is omitted.
In the following, when the distinction between the mobile terminal 1 and the imaging device 2 is described, in the case of the mobile terminal 1, “−1” is added to the end of the code, and in the case of the imaging device 2, the end of the code. "-2" is added to That is, in the case of the portable terminal 1, the CPU 11-1 to the removable medium 31-1 are described, and in the case of the imaging device 2, the CPU 11-2 to the removable medium 31-2 are described.

FIG. 3 is a functional block diagram showing a functional configuration for executing a mode setting process (mode update process) and a reconnection process after disconnection of the communication connection among the functional configurations of the mobile terminal 1 of FIG. .
The mode setting process (mode update process) refers to a series of processes for setting the connection mode in the connected state with the imaging apparatus 2.
Also, a reconnection process after disconnection of the communication connection and a series of processes from the connection waiting state with the imaging apparatus 2 after the mode setting.

  When executing the mode setting process (mode update process) and the reconnection process after disconnection of the communication connection, as shown in FIG. 3, the CPU 11-1 includes a communication management unit 51 and a mode setting unit 53. The communication control unit 52 functions in the communication unit 20-1.

Further, a cutting time storage unit 71 and a mode storage unit 72 are set in one area of the storage unit 19-1.
The disconnection time storage unit 71 stores a disconnection time after BLE connection with the imaging device 2.
The mode storage unit 72 stores the currently set mode.

  In the mode setting process (mode update process), the communication management unit 51, the communication control unit 52, and the mode setting unit 53 execute the following processes.

The communication management unit 51 manages the communication state with the imaging device 2 in BLE communication.
Specifically, the communication management unit 51 can detect disconnection of the connection with the imaging apparatus 2 via the communication unit 20-1, for example.
In addition, when there is a disconnection, the communication management unit 51 can store the disconnection detection time (hereinafter referred to as “disconnection time”) in the disconnection time storage unit 71. In the present embodiment, the time when the past 10 cuts are detected can be sequentially stored in the cutting time storage unit 71.
Further, the communication management unit 51 confirms the stability of the connection from the disconnection information. The connection status is, for example, when there is no past disconnection history for 5 times, and there is an opening of 10 minutes or more between the latest and oldest disconnection time among the past 5 disconnection times. In the case where the latest and oldest disconnection time is within 10 minutes among the past five disconnection times, the connection can be unstable.
Moreover, the communication management part 51 can determine whether the advertising signal from the imaging device 2 was detected in the communication part 20-1.
Further, the communication management unit 51 confirms the radio field intensity with the imaging device 2. In the confirmation of the radio field intensity, the current radio field intensity can be confirmed based on the average value of the radio field intensity of the advertising signal a plurality of times (in this embodiment, for example, five times). In the present embodiment, for example, the case where the frequency is −100.0 db or less is defined as the radio wave intensity [weak], and the case where the frequency is higher than −80.0 db to −100.0 db is defined as the radio wave intensity [medium], and from −80.0 db In the above case, the radio wave intensity [strong] can be set.

The communication control unit 52 controls BLE communication with the imaging device 2 in the communication unit 20-1.
Specifically, for example, the communication control unit 52 controls the communication unit 20-1 to execute the SCAN process.

The mode setting unit 53 sets a connection mode in BLE communication.
Specifically, the mode setting unit 53 returns a response when an advertising signal is detected, for example, when the radio wave intensity is [strong] / [medium] in the connection stable state and the connection unstable state. Mode (hereinafter referred to as “connection normal mode”). In addition, for example, when the radio wave intensity is “weak” in the unstable connection state, the mode setting unit 53 does not return a response when an advertising signal is detected (hereinafter referred to as “connection inhibition mode”). ) Is set.

  In the reconnection process after the communication connection is disconnected, the communication management unit 51, the communication control unit 52, and the mode setting unit 53 execute the following processes.

The communication management unit 51 manages the communication state with the imaging device 2 in BLE communication.
Specifically, the communication management unit 51 can detect an advertising signal from the imaging device 2 via, for example, the communication unit 20-1.
Further, the communication management unit 51 can check the radio field intensity with the imaging device 2. In the confirmation of the radio field intensity, the current radio field intensity can be confirmed based on the average value of the radio field intensity of the advertising signal a plurality of times (in this embodiment, for example, five times). In the present embodiment, for example, the case where the frequency is −100.0 db or less is defined as the radio wave intensity [weak], and the case where the frequency is higher than −80.0 db to −100.0 db is defined as the radio wave intensity [medium], and from −80.0 db In the above case, the radio wave intensity [strong] can be set.

The communication control unit 52 controls BLE communication with the imaging device 2 in the communication unit 20-1.
Specifically, the communication control unit 52 can try to detect the advertising signal from the imaging device 2 by performing control so that the communication unit 20-1 performs the SCAN process. In addition, when the radio wave intensity is “strong” in the normal connection mode, the communication control unit 52 responds to the imaging device 2 with an advertising signal, and executes the subsequent connection processing so that the communication unit 20-1 executes the connection process. Can be controlled.

The mode setting unit 53 sets a connection mode in BLE communication.
Specifically, the mode setting unit 53 can confirm the current mode with reference to the mode storage unit 72.

FIG. 4 is a flowchart illustrating the flow of the mode setting process (mode update process) executed by the mobile terminal 1 of FIG. 2 having the functional configuration of FIG.
In the mode setting process (mode update process), when the communication unit 20-1 determines that the communication connection is disconnected in a state where the BLE connection with the imaging device 2 is established, a signal notifying the communication unit 20-1 20-1 is input to the CPU 11-1, and execution is started as an interrupt process in response to this signal input. In addition, you may make it start by operation of the mode setting process (mode update process) start to the input part 17-1 by a user.

  In step S11, the communication management unit 51 detects disconnection of the connection with the imaging device 2 via the communication unit 20-1.

  In step S <b> 12, when there is a disconnection, the communication management unit 51 stores the disconnection time in the disconnection time storage unit 71. Specifically, the communication management unit 51 can store the time when the past 10 disconnections are detected in the disconnection time storage unit 71, and if it exceeds 10 times, it is not the latest 10 disconnection times Is deleted.

In step S13, the communication management unit 51 confirms the connection stability from the disconnection information. For example, when there is no past disconnection history for 5 times, or there is a gap of 10 minutes or more between the latest and oldest disconnection times among the past 5 disconnection times, State. Further, for example, if the latest and oldest cutting times are within 10 minutes among the past five cutting times, the connection is unstable.
If the connection stability is not confirmed, it is determined as “connection unstable state” in step S13, and the process proceeds to step S15.
On the other hand, when the stability of the connection is confirmed, it is determined as “connection stable state” in step S13, and the process proceeds to step S14.

  In step S14, the mode setting unit 53 sets the connection normal mode. The mode setting result is stored in the mode storage unit 72.

  In step S <b> 15, the communication control unit 52 controls the communication unit 20-1 to execute the SCAN process, and tries to detect an advertising signal from the imaging device 2.

In step S <b> 16, the communication management unit 51 determines whether or not the advertising signal from the imaging device 2 is detected in the communication unit 20-1.
If an advertising signal is not detected, NO is determined in step S16, and the process proceeds to step S18.
On the other hand, if an advertising signal is detected, YES is determined in step S16, and the process proceeds to step S17.

In step S <b> 17, the communication management unit 51 confirms the radio field intensity with the imaging device 2. In the confirmation of the radio field intensity, the current radio field intensity is confirmed based on the average value of the radio field intensity of the advertising signal a plurality of times (in this embodiment, for example, 5 times).
Specifically, for example, the case of −100.0 db or less is defined as radio wave intensity [weak], the case above −80.0 db to −100.0 db is defined as radio wave intensity [medium], and is greater than −80.0 db. In the above case, the radio wave intensity is [strong].
If the radio wave intensity is [strong] and the radio wave intensity is [medium], it is determined in step S17 that [radio wave intensity: strong or medium], and the process returns to step S14. In step S14, the connection normal mode is set.
If the radio wave intensity is [weak], it is determined in step S17 that [radio wave intensity: weak], and the process proceeds to step S18.

In step S18, the mode setting unit 53 sets the connection suppression mode. The mode setting result is stored in the mode storage unit 72.
Thereafter, this mode setting process (mode update process) is performed every time a signal is received from the communication unit 20-1 notifying that the communication connection has been disconnected, unless the user intentionally disconnects the communication connection. To be executed.

FIG. 5 is a flowchart for explaining the flow of the reconnection process after the disconnection of the communication connection executed by the mobile terminal 1 of FIG. 2 having the functional configuration of FIG. 3, and the mode is changed by the mode setting process (mode update process). It is executed in parallel with the update.
This reconnection process is automatically started when the communication connection is disconnected unintentionally by the user due to deterioration of the radio wave condition or the like. It may be started by an operation of starting reconnection processing to the input unit 17-1 by the user.

  In step S <b> 31, the communication control unit 52 controls the communication unit 20-1 to execute the SCAN process, and tries to detect an advertising signal from the imaging device 2.

  In step S32, the communication management unit 51 detects an advertising signal from the imaging device 2 via the communication unit 20-1.

In step S33, the mode setting unit 53 refers to the mode storage unit 72 and confirms the current mode.
If it is in the connection normal mode, it is determined as [connection normal mode] in step S33, and the process proceeds to step S36.
On the other hand, if it is in the connection inhibition mode, it is determined as “connection inhibition mode” in step S33, and the process proceeds to step S34.

In step S <b> 34, the communication management unit 51 confirms the radio field intensity with the imaging device 2. In the confirmation of the radio field intensity, the current radio field intensity is confirmed based on the average value of the radio field intensity of the advertising signal a plurality of times (in this embodiment, for example, 5 times).
Specifically, for example, the case of −100.0 db or less is defined as radio wave intensity [weak], the case above −80.0 db to −100.0 db is defined as radio wave intensity [medium], and is greater than −80.0 db. The above case is defined as the radio field strength [strong].
In the case of the radio wave intensity [weak] and the radio wave intensity [medium], it is determined in step S34 that [radio wave intensity: weak or medium], and since the connection suppression mode is set, the reconnection process after disconnection of the communication connection ends To do.
On the other hand, if the radio wave intensity is [strong], it is determined as [radio wave intensity: strong] in step S34, and the process proceeds to step S35.

  In step S35, the mode setting unit 53 sets the connection normal mode. The mode setting result is stored in the mode storage unit 72.

In step S <b> 36, the communication control unit 52 responds to the advertising signal to the imaging device 2 and controls the communication unit 20-1 to execute the subsequent connection process.
Thereafter, the reconnection process after the disconnection of the communication connection is terminated.

Here, an operation example of the communication system S will be described.
FIG. 6 is a schematic diagram for explaining an operation example of the communication system S. In FIG. 6, the wireless IC corresponds to the communication unit 20-1, the power supply circuit corresponds to the main power supply, and the control unit corresponds to the CPU 11-1.
In the embodiment described above, as illustrated in FIG. 6A, the imaging device 2 can function as a peripheral, and the mobile terminal 1 can function as a central. In this case, in a state where the connection is unstable, the portable terminal 1 does not respond to the advertising signal from the imaging device 2 so that the imaging device 2 is not activated and the power consumption of the imaging device 2 is reduced. Can be suppressed.

  Further, as shown in FIG. 6B, the mobile terminal 1 can function as a peripheral, and the imaging device 2 can function as a central. In this case, it is determined whether or not to respond to the advertising signal from the portable terminal 1 from the communication history or the like on the imaging device 2 side. As a result, connection processing is automatically performed in an unstable connection state, and it is possible to prevent unnecessary power consumption.

In the operation example shown in FIGS. 6A and 6B, the imaging device 2 is a dedicated device capable of turning on / off the main power supply while maintaining the communication connection, and the mobile terminal 1 is a general-purpose device such as a smartphone. Since the apparatus is assumed, the main power supply cannot be turned on / off while the communication connection is maintained, and the activation state of the application program is controlled.
Further, as shown in FIG. 6C, the portable terminal 1 is also configured as a dedicated device (dedicated controller) instead of a general-purpose device so that the main power supply can be turned on / off while maintaining communication connection. Also good. In this case, the controller may be configured to transmit an advertising signal when the power is turned on.

Here, the relationship between the above embodiment and the prerequisite technology will be supplemented below.
There is known a technology that can start a wireless function by starting a camera by BLE communication technology, and the hardware configuration makes it possible to maintain BLE connection even when the camera is turned off. Also, with this technology, when the camera is in a power-off state while taking advantage of BLE, various BLE events can be detected by the BLE hardware, and the camera can be turned on as a factor. It has become.
However, as a factor when starting with BLE, it can be started due to various factors such as BLE disconnection, connection, BLE read / write requests from external devices such as tablet terminals, etc. If the power supply is started up normally, extra processing is performed, which is disadvantageous in terms of power.
Further, when the camera is activated by BLE, the camera is turned off and the contents of the BLE connection cannot be left in the RAM or the like, so it is difficult to leave information on which BLE event was activated.
Further, in the current mechanism, when an external device such as a tablet terminal detects a BLE signal, it performs a process of immediately connecting regardless of the situation. Even from this mechanism, if the connection becomes unstable due to the distance between the camera and the external device such as the tablet terminal, it becomes a situation where BLE disconnection and connection are repeated, and wasteful start-up is repeated, which is disadvantageous in terms of power. Become.

Therefore, in this embodiment, when an BLE connection is established with an external device such as a tablet terminal, the BLE connection method is changed according to the radio wave intensity of the advertising signal, which is the BLE signal of the camera, and the connection / disconnection frequency of the BLE. To do. As a result, it is possible to suppress the event that the camera is unnecessarily activated by the detection of the advertising signal.
In other words, in this embodiment, unnecessary camera activation processing is suppressed by connecting the camera to an external device such as a tablet terminal in consideration of the stability / instability of the connection based on the BLE disconnection frequency and the radio wave intensity. In this case, a stable connection is possible. By minimizing the case where the camera is caused by a BLE event, it is possible to suppress battery consumption of the camera processing due to the BLE event as much as possible.

<Prerequisites>
If the BLE of the camera is in the state of advertisement detection or connection, the BLE module is set to Sleep, and the other power is turned off while maintaining the BLE output.
[Processing of external devices such as tablet devices]
The external device records the following information during the BLE connection process.
1) Time information when BLE disconnection is detected (for example, past 10 times)
2) The camera advertising signal is sent a specified number of times (for example, 5 times) after BLE disconnection.
3) Field strength of communication during 1) and 2) After that, the connection mode is determined and switched to the following mode as necessary.
"Normal connection mode"-A mode that always connects when an advertising signal is detected. "Connection suppression mode"-A mode that connects when it is determined that there is a camera at a short distance from the signal strength of the advertising signal.

Thereafter, when the BLE advertising signal is detected, the following processing is performed.
The camera is connected to an external device such as a tablet terminal in consideration of the connection stability / instability by the BLE disconnection frequency and radio wave intensity.
This suppresses useless camera activation processing, and enables stable connection. By minimizing the case where the camera is caused by a BLE event, it is possible to suppress battery consumption of the camera processing due to the BLE event as much as possible.

The mobile terminal 1 configured as described above includes a communication unit 20-1, a communication management unit 51, and a communication control unit 52.
When the communication unit 20-1 receives a predetermined wireless signal emitted by another device, the communication unit 20-1 shifts to a communication connection state with the other device, and determines that wireless communication cannot be performed in this communication connection. The communication connection is disconnected and the communication connection is released.
When the communication connection by the communication unit 20-1 is disconnected, the communication management unit 51 records the disconnection history.
When the communication control unit 52 receives a radio signal emitted by another device, the communication control unit 52 determines a communication connection state with the other device based on the disconnection history recorded by the communication management unit 51. Control the transition to
Thereby, in the portable terminal 1, when communication connection is cut | disconnected unintentionally due to deterioration of a radio wave state etc., subsequent reconnection can be performed effectively.

The communication unit 20-1 determines that wireless communication cannot be performed when a state in which wireless communication cannot be performed due to deterioration of the radio wave state continues for a predetermined time or longer in the communication connection state.
Thereby, in the portable terminal 1, it is possible to determine a case where the communication connection is unintentionally disconnected due to deterioration of the radio wave state or the like.

When the communication control unit 52 receives a radio signal emitted by another device, the communication control unit 52 identifies the radio wave intensity at that time, and when the radio wave intensity is equal to or greater than a predetermined value, the communication unit 20-1 communicates with the other device. If the radio wave intensity is less than or equal to the predetermined value, the communication unit 20-1 switches to the communication connection state with the other device based on the disconnection history recorded by the communication management unit 51. Control migration.
Thereby, in the portable terminal 1, based on the disconnection history, the communication connection can determine the deterioration of the radio wave state.

The communication management unit 51 records at least one of the past number of disconnections, frequency, and time as a history of disconnection of the communication connection state by the communication unit 20-1.
When the communication control unit 52 receives a radio signal emitted by another device, the communication control unit 52 performs the communication unit 20-1 based on at least one of the number of past disconnections, the frequency, and the elapsed time since the last disconnection. It is determined whether or not to shift to a communication connection state with the other device.
Thereby, in the portable terminal 1, the communication connection can determine the deterioration of the radio wave state based on the number, frequency, and time of the past disconnection.

Based on the disconnection history recorded by the communication management unit 51, the communication control unit 52 switches and sets a plurality of connection modes with different conditions for shifting to a communication connection state, and receives a radio signal emitted by another device. In this case, the transition to the communication connection state with the other device by the communication unit 20-1 is controlled according to the difference in the connection mode.
Thereby, in the portable terminal 1, when communication connection is cut | disconnected due to the deterioration of an electromagnetic wave state, subsequent reconnection can be simply and effectively performed by the difference in connection mode.

The communication control unit 52 switches and sets a plurality of connection modes having different conditions for shifting to the communication connection state based on the disconnection history and the current radio wave intensity recorded by the communication management unit 51, and other devices emit When the wireless signal is received, the transition to the communication connection state with the other device by the communication unit 20-1 is controlled based on the connection mode and the current radio wave intensity.
Thereby, in the portable terminal 1, when communication connection is cut | disconnected due to the deterioration of an electromagnetic wave state, subsequent reconnection can be simply and effectively performed by the difference in connection mode.

  In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

  In the above-described embodiment, the connection processing is automatically performed by responding to the advertising signal when the radio wave intensity is strong in the unstable connection state. You may comprise so that response availability may be determined.

In the above-described embodiment, when an advertising signal is received, the power supply other than the communication unit 20-1 is turned on / off when the connection is stable and the radio wave intensity does not respond. Also good.
Specifically, in the imaging apparatus 2, when a predetermined wireless signal (advertising signal) generated by another device is received in the power supply control unit of the CPU 11-1, the main power supply is turned on, and a predetermined condition is satisfied. Thus, the main power supply other than the communication unit 20-1 is shifted to the off state.
When the communication control unit 52 receives a wireless signal emitted by another device, the communication control unit 52 uses a history of disconnection recorded by the communication management unit 51 to add to the communication unit 20-1 other than the communication unit 20-1 by the power control unit of the CPU 11-1. Controls the transition of the power supply to be turned on.

Further, in the above-described embodiment, when data communication is performed in a state where communication is established, a power supply other than the communication unit 20-1 may be turned off.
Specifically, the communication control unit 52 maintains the communication connection state by the communication unit 20-1 and starts the data transfer between the communication unit 20-1 and another device. The power supply other than -1 is shifted to the off state.

Further, in the above-described embodiment, it may be configured to automatically perform shooting after communication is established.
Specifically, the imaging device 2 further includes an imaging control unit that controls the imaging unit 16-2 using wireless communication by the communication unit 20-2.

In the above-described embodiment, the mobile terminal 1 to which the present invention is applied has been described using a tablet terminal as an example, but is not particularly limited thereto.
For example, the present invention can be applied to general electronic devices having a mode setting process (mode update process) function and a reconnection process after disconnection of a communication connection. Specifically, for example, the present invention can be applied to a notebook personal computer, a printer, a television receiver, a digital camera, a video camera, a portable navigation device, a mobile phone, a smartphone, a portable game machine, and the like.

The series of processes described above can be executed by hardware or can be executed by software.
In other words, the functional configuration of FIG. 3 is merely an example, and is not particularly limited. That is, it is sufficient that the mobile terminal 1 has a function capable of executing the above-described series of processes as a whole, and what functional blocks are used to realize this function is not particularly limited to the example of FIG.
In addition, one functional block may be constituted by hardware alone, software alone, or a combination thereof.
The functional configuration in the present embodiment is realized by a processor that executes arithmetic processing, and the processor that can be used in the present embodiment is configured by various processing devices such as a single processor, a multiprocessor, and a multicore processor. In addition to the above, these various processing apparatuses and a combination of processing circuits such as ASIC (Application Specific Integrated Circuit) and FPGA (Field-Programmable Gate Array) are included.

When a series of processing is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium.
The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is not only constituted by the removable medium 31 of FIG. 2 distributed separately from the apparatus main body in order to provide the program to the user, but also in a state of being incorporated in the apparatus main body in advance. It is comprised with the recording medium etc. which are provided in. The removable medium 31 is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disc is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disc), a Blu-ray (registered trademark) Disc (Blu-ray Disc), and the like. The magneto-optical disk is configured by an MD (Mini-Disk) or the like. In addition, the recording medium provided to the user in a state of being preliminarily incorporated in the apparatus main body is configured by, for example, the ROM 12 in FIG.

In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in time series along the order, but is not necessarily performed in time series, either in parallel or individually. The process to be executed is also included.
Further, in the present specification, the term “system” means an overall device configured by a plurality of devices, a plurality of means, and the like.

  As mentioned above, although several embodiment of this invention was described, these embodiment is only an illustration and does not limit the technical scope of this invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the gist of the present invention. These embodiments and modifications thereof are included in the scope and gist of the invention described in this specification and the like, and are included in the invention described in the claims and the equivalent scope thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication means for shifting to a communication connection release state,
A disconnection history recording unit that records a disconnection history when the communication connection by the wireless communication unit is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording unit, the transition to the communication connection state with the other device by the wireless communication unit is controlled. Control means;
A communication control apparatus comprising:
[Appendix 2]
The wireless communication means determines that wireless communication cannot be performed when a state in which wireless communication cannot be performed due to deterioration in radio wave state continues for a predetermined time or longer in the communication connection state.
The communication control apparatus according to appendix 1, wherein:
[Appendix 3]
When the control means receives a radio signal emitted by another device, the control means identifies the current radio wave intensity, and if the radio wave intensity is equal to or greater than a predetermined value, the radio communication means communicates with the other apparatus. When the radio field intensity is below a predetermined level, the wireless communication unit shifts to the communication connection state with the other device based on the disconnection history recorded by the disconnection history recording unit. Control,
The communication control apparatus according to appendix 1 or 2, characterized in that:
[Appendix 4]
The disconnection history recording unit records at least one of the past number of disconnections, frequency, and time as a history of disconnection of the communication connection by the wireless communication unit,
When the control unit receives a radio signal emitted by another device, the control unit performs the other communication by the radio communication unit based on at least one of the number of times of disconnection in the past, the frequency, and the elapsed time since the last disconnection. To determine whether or not to shift to a communication connection state with other devices,
4. The communication control device according to any one of appendices 1 to 3, wherein
[Appendix 5]
When a predetermined wireless signal emitted by another device is received, the main power is shifted to an on state, and a predetermined condition is further provided with power control means for shifting the main power to an off state,
The control means, when receiving a wireless signal emitted by another device, based on the disconnection history recorded by the disconnection history recording means, supplies power other than the wireless communication means by the power supply control means Control the transition to the on state,
The communication control device according to any one of supplementary notes 1 to 4, wherein
[Appendix 6]
The control means turns off the power supply other than the wireless communication means when the wireless communication means starts data transfer with another device while maintaining the communication connection state by the wireless communication means. Transition,
The communication control device according to any one of appendices 1 to 5, characterized in that:
[Appendix 7]
It further has an imaging means,
Further comprising imaging control means for controlling the imaging means using wireless communication by the wireless communication means,
The communication control device according to any one of appendices 1 to 6, characterized in that:
[Appendix 8]
The control means switches and sets a plurality of connection modes with different conditions for shifting to the communication connection state based on the disconnection history recorded by the disconnection history recording means, and receives a radio signal emitted by another device In the case, according to the difference in the connection mode, to control the transition to the communication connection state with the other device by the wireless communication means,
The communication control device according to any one of appendices 1 to 7, characterized in that:
[Appendix 9]
The control means switches and sets a plurality of connection modes with different conditions for shifting to a communication connection state based on the disconnection history recorded by the disconnection history recording means and the current radio wave intensity, and is emitted from another device When receiving a wireless signal, based on the connection mode and the current radio wave intensity, control the transition to a communication connection state with the other device by the wireless communication means,
9. The communication control device according to appendix 8, wherein
[Appendix 10]
A communication control method executed by a communication control device,
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection state is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication processing to shift to the communication connection release state,
A disconnection history recording process for recording the disconnection history when the communication connection state by the wireless communication process is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording process, the transition to the communication connection state with the other device by the wireless communication process is controlled. Control processing,
The communication control method characterized by including.
[Appendix 11]
A computer for controlling the communication control device;
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection state is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication function to shift to the communication connection release state,
A disconnection history recording function for recording a disconnection history when the communication connection state by the wireless communication function is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording function, the transition to the communication connection state with the other device by the wireless communication function is controlled. Control function,
A program characterized by functioning as

  DESCRIPTION OF SYMBOLS 1 ... Portable terminal, 2 ... Imaging device, 11 ... CPU, 12 ... ROM, 13 ... RAM, 14 ... Bus, 15 ... Input / output interface, 16 ... Imaging unit, 17 ... input unit, 18 ... output unit, 19 ... storage unit, 20 ... communication unit, 21 ... drive, 31 ... removable media, 51 ... communication management , 52... Communication control unit, 53... Mode setting unit, 71... Cutting time storage unit, 72.

Claims (11)

When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication means for shifting to a communication connection release state,
A disconnection history recording unit that records a disconnection history when the communication connection by the wireless communication unit is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording unit, the transition to the communication connection state with the other device by the wireless communication unit is controlled. Control means;
A communication control apparatus comprising: The wireless communication means determines that wireless communication cannot be performed when a state in which wireless communication cannot be performed due to deterioration in radio wave state continues for a predetermined time or longer in the communication connection state.
The communication control apparatus according to claim 1. When the control means receives a radio signal emitted by another device, the control means identifies the current radio wave intensity, and if the radio wave intensity is equal to or greater than a predetermined value, the radio communication means communicates with the other apparatus. When the radio field intensity is below a predetermined level, the wireless communication unit shifts to the communication connection state with the other device based on the disconnection history recorded by the disconnection history recording unit. Control,
The communication control apparatus according to claim 1 or 2, characterized by the above. The disconnection history recording unit records at least one of the past number of disconnections, frequency, and time as a history of disconnection of the communication connection by the wireless communication unit,
When the control unit receives a radio signal emitted by another device, the control unit performs the other communication by the radio communication unit based on at least one of the number of times of disconnection in the past, the frequency, and the elapsed time since the last disconnection. To determine whether or not to shift to a communication connection state with other devices,
The communication control device according to any one of claims 1 to 3, wherein When a predetermined wireless signal emitted by another device is received, the main power is shifted to an on state, and a predetermined condition is further provided with power control means for shifting the main power to an off state,
The control means, when receiving a wireless signal emitted by another device, based on the disconnection history recorded by the disconnection history recording means, supplies power other than the wireless communication means by the power supply control means Control the transition to the on state,
The communication control apparatus according to any one of claims 1 to 4, wherein the communication control apparatus includes: The control means turns off the power supply other than the wireless communication means when the wireless communication means starts data transfer with another device while maintaining the communication connection state by the wireless communication means. Transition,
The communication control apparatus according to any one of claims 1 to 5, wherein It further has an imaging means,
Further comprising imaging control means for controlling the imaging means using wireless communication by the wireless communication means,
The communication control apparatus according to any one of claims 1 to 6, wherein the communication control apparatus includes: The control means switches and sets a plurality of connection modes with different conditions for shifting to the communication connection state based on the disconnection history recorded by the disconnection history recording means, and receives a radio signal emitted by another device In the case, according to the difference in the connection mode, to control the transition to the communication connection state with the other device by the wireless communication means,
The communication control apparatus according to any one of claims 1 to 7, wherein the communication control apparatus includes: The control means switches and sets a plurality of connection modes with different conditions for shifting to a communication connection state based on the disconnection history recorded by the disconnection history recording means and the current radio wave intensity, and is emitted from another device When receiving a wireless signal, based on the connection mode and the current radio wave intensity, control the transition to a communication connection state with the other device by the wireless communication means,
The communication control apparatus according to claim 8. A communication control method executed by a communication control device,
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication processing to shift to the communication connection release state,
When the communication connection by the wireless communication process is disconnected, a disconnection history recording process for recording the disconnection history;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording process, the transition to the communication connection state with the other device by the wireless communication process is controlled. Control processing,
The communication control method characterized by including. A computer for controlling the communication control device;
When a predetermined wireless signal from another device is received, the communication connection state with the other device is entered, and the communication connection is disconnected when it is determined that wireless communication is not possible in this communication connection state. Wireless communication function to enter the communication connection release state,
A disconnection history recording function for recording a disconnection history when the communication connection by the wireless communication function is disconnected;
When a wireless signal emitted by another device is received, based on the disconnection history recorded by the disconnection history recording function, the transition to the communication connection state with the other device by the wireless communication function is controlled. Control function,
A program characterized by functioning as

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