JP2016158118A - Communication device, communication system, communication method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device for performing communication with a PLMN (public land mobile network) by automatically changing over a card between a high-speed communication SIM (Subscriber Identity Module) card when a user is out of home and a low-speed communication SIM card when the user is at home.SOLUTION: A communication device includes: a first communication section for performing communication with the first connection destination by selecting the first communication condition or a second communication condition; a second communication section for performing communication with the second connection destination; a sensor for monitoring the state of the communication apparatus; and a control section for changing over a condition into the second communication condition when the second communication section establishes connection during the connection of the first communication section by using the first communication condition, and into the first communication condition on the basis of a predetermined condition including the state of the communication device when the second communication section does not establish connection during the connection of the first communication section by using the second communication condition.SELECTED DRAWING: Figure 7

Description

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

  Many wireless communication devices such as mobile phones, smart phones, and mobile routers are equipped with a SIM (Subscriber Identity Module) and connected to a public land mobile network (PLMN). A SIM card is inserted into the SIM, and the SIM card is provided by the operator of the PLMN. The SIM card stores a country code, a company number, a card number, and the like.

  In addition, there are many types of these wireless communication devices that can be connected to a wireless local area network (LAN) connected to a fixed line. Therefore, when going out, SIM is used to perform data communication with PLMN, and at home, data communication is performed using a wireless LAN that is connected to a fixed line at home and has a very low usage fee. There are common ways to save money.

  However, when the wireless communication device is connected to the wireless LAN for data communication at home, but the connection to the wireless LAN is disconnected for some reason, the wireless communication device connects the data communication from the wireless LAN to the PLMN. Automatically switch to connection. As a result, a large amount of data communication may occur with the PLMN without the user being aware of it.

  Here, as a contract form of the SIM card, there is a SIM card for high-speed communication that performs high-speed communication up to a certain amount of monthly data communication, but becomes low-speed communication when the amount exceeds a certain amount. Using this SIM card for high-speed communication, if a large amount of data communication is performed unconsciously as in the example shown above, the amount of data exceeds a certain amount allowed for high-speed communication, and then the speed is low. Only communication can be used.

  Another SIM card contract type is a SIM card for low-speed communication that cannot perform high-speed communication but has a low usage fee and no restriction on the amount of communication.

  On the other hand, there is a model in which two SIMs, which are also called dual SIM machines, are installed in wireless communication devices.

  Therefore, it is considered that a SIM card for high-speed communication and a SIM card for low-speed communication are inserted into a dual SIM machine and switched to a SIM card for low-speed communication at home, and a SIM card for high-speed communication outside the home. .

  In this way, even if the user is performing data communication using the wireless LAN at home and the wireless LAN is disconnected for some reason, the user is connected to the PLMN using the low-speed communication SIM card at home. Therefore, a situation where data communication cannot be performed is avoided. Further, the SIM card for high-speed communication is not used without the user's consciousness.

  When the wireless LAN connection is shifted to the connection to the PLMN by the SIM card for low-speed communication, the user feels inconvenience because the data communication becomes low-speed. However, the user can confirm that the connection destination has been changed by the display of the wireless communication device, and the user can confirm the connection with the wireless LAN and restore it.

  However, in order to properly use the two SIM cards in this way, the user needs to manually switch the SIM, and in order to avoid forgetting the user's operation, it is desirable to automate the switching of the SIM.

  A related technique is disclosed in Patent Document 1 as a method in which a wireless communication device automatically switches SIMs. In Patent Document 1, a SIM card corresponding to a PLMN that can communicate at a place where a wireless communication device is placed is determined by the wireless communication device as to which of the two SIM cards the dual SIM device selects and communicates. Shows how to select and connect.

  For example, when a SIM card for domestic PLMN and a SIM card for overseas PLMN are inserted in the wireless communication device, the wireless communication device determines whether the place of use is domestic or overseas and the wireless communication device uses it. Select the SIM card to be used.

Special table 2009-542149

  However, Patent Document 1 does not disclose a method of selecting and switching one of a plurality of SIM cards by determining a connection status with a wireless system other than a PLMN such as a home wireless LAN.

  An object of the wireless communication device of the present invention is to automatically switch to a SIM card for high-speed communication when a user goes out and to a PLMN by switching automatically to a SIM card for low-speed communication when at home.

  In order to achieve the above object, a communication device of the present invention includes a first communication unit that selects a first communication condition or a second communication condition and communicates with a first connection destination, A second communication unit that communicates with a connection destination, a sensor unit that monitors a state of the communication device, and the second communication unit while the first communication unit is connected using the first communication condition Switch to the second communication condition when connected, and the first communication unit includes the state of the communication device when the second communication unit is not connected during the connection using the second communication condition And a control unit that switches to the first communication condition based on a predetermined condition.

  According to the present invention, the wireless communication device can automatically switch to the SIM card for high-speed communication when the user goes out and communicate with the PLMN by automatically switching to the SIM card for low-speed communication when at home.

FIG. 3 is a diagram illustrating a configuration example of a first embodiment. FIG. 6 is a diagram for explaining the operation of the first embodiment. FIG. 6 is a diagram for explaining the operation of the first embodiment. FIG. 6 is a diagram for explaining the operation of the first embodiment. It is a figure explaining operation | movement of 2nd Embodiment. It is a figure explaining operation | movement of 3rd Embodiment. It is a figure explaining operation | movement of 4th Embodiment. It is a figure explaining operation | movement of a modification. It is a figure explaining operation | movement of a modification.

[First Embodiment]
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[Description of configuration]
FIG. 1 shows the configuration of the first embodiment.

  The wireless communication device 100 of this embodiment is a smart phone, a mobile router, or the like. The wireless communication device 100 includes a WAN (Wide Area Network) wireless unit 101, a SIM-A 102, a SIM-B 103, and a LAN wireless unit 104. Further, the wireless communication device 100 includes a display unit 105, an input unit 106, a control unit 107, a storage unit 108, and a sensor unit 109.

  The WAN wireless unit 101 is a circuit that wirelessly communicates with a PLMN base station, and uses a communication method such as IMT-2000 (International Mobile Telecommunication 2000), LTE (Long Term Evolution), or WiMAX (Worldwide Interoperability for Microwave Access).

  SIM-A 102 and SIM-B 103 are modules for inserting SIM cards, respectively. This SIM card is an IC card in which identification information necessary for the WAN radio unit 101 to connect to the PLMN is stored as a communication condition.

  In this embodiment, it is assumed that the SIM card inserted into these SIMs has the following contract with the PLMN operator. That is, the SIM card inserted into the SIM-A 102 performs high-speed communication up to a predetermined amount of accumulated usage data per month, and when the amount exceeds a predetermined amount, it becomes low-speed communication until the end of the month. . Further, it is assumed that the SIM card inserted into the SIM-B 103 has a low usage fee but a low-speed communication.

  Further, the LAN wireless unit 104 is a circuit that communicates wirelessly with a LAN base station called a hot spot or home router installed in a home. The communication method of the LAN wireless unit 104 is IEEE802.11 defined by IEEE (The Institute of Electrical and Electronics Engineers, Inc.), which is a wireless LAN standard, but other than Bluetooth (registered trademark). May be.

  The display unit 105 is a display unit such as a liquid crystal display for informing the user of information, and the input / output unit 106 is an input unit such as a keyboard or a touch panel for the user to input information. The control unit 107 is connected to each component of the wireless communication device 100 and is a CPU (Central Processing Unit) that controls each component, and the storage unit 108 is a storage element for storing information. is there.

Furthermore, the sensor unit 109 is a sensor for estimating the movement of the wireless communication device 100, such as a sensor for monitoring the acceleration of the wireless communication device 100 main body, a sensor for monitoring the position, or the like. If the sensor unit 109 is an acceleration sensor, acceleration information is output as a numerical value, and if the sensor unit 109 is a position monitoring sensor, position information such as latitude and longitude is output as a numerical value. The output information of these sensors provides information that is a basis for determining whether or not the user of the wireless communication device 100 is at home.
[Description of operation]
Next, the operation of the present embodiment will be described in detail with reference to FIG. 2, FIG. 3, and FIG.

  First, before using the wireless communication device 100, the user stores information necessary for the storage unit 108 in advance. Here, information stored in the storage unit 108 will be described with reference to FIG. FIG. 2 is a diagram illustrating information stored in the storage unit 108.

  Information stored in the storage unit 108 is SIM-A information 111, SIM-B information 112, and home network information 113. The SIM-A information 111 is information on whether the SIM card inserted into the SIM-A 102 is used for going out or at home. The SIM-B information 112 is the SIM card inserted into the SIM-B 103. This is information about whether the card is used for going out or at home.

  The home network information 113 is information such as an SSID (Service Set Identifier) identifying a base station registered as a home network, or a Bluetooth device name.

  A specific image of the display unit 105 when the user stores these pieces of information in the storage unit 108 is shown in FIG. The display unit 105 is a touch panel and may also serve as the input unit 106, and may include a keyboard as the input unit 106 separately from the display unit 105. The user operates the input unit 106 while looking at the display unit 105 to store information in the storage unit 108.

  In FIG. 3, first, a home network SIM, that is, a home SIM is selected. Here, assuming that a SIM for high speed communication is inserted in the SIM-A 102 and a SIM for low speed communication is inserted in the SIM-B 103, the SIM-B is selected for home use.

  Next, the home network is registered. If the home network is a wireless LAN, the SSID of the home network base station is registered. If the home network is Bluetooth, the Bluetooth device name of the home network base station is registered. In FIG. 3, a plurality of home network base stations are registered to correspond to a plurality of home networks.

  As described above, the user stores information in the storage unit 108 in advance.

  The sensor information 114 is information used for determination to switch from the home SIM to the outing SIM when there is no connection to the home network. In other words, when detecting the movement of the wireless communication device 100, a criterion for determining what value the sensor unit 109 outputs is stored. This sensor information 114 is assumed to be stored in the storage unit 108 in advance.

  Next, the operation of the wireless communication device 100 in which information is stored in the storage unit 108 as described above will be described with reference to FIG.

  When the wireless communication device 100 starts operation, the control unit 107 acquires information from the WAN wireless unit 101 whether the currently used SIM (hereinafter referred to as an active SIM) is SIM-A 102 or SIM-B 103. (S101). As the active SIM, the SIM that was last used last time by the wireless communication device 100 is normally selected. Next, the control unit 107 refers to the SIM-A information 111 and the SIM-B information 112 in the storage unit 108 and determines whether the active SIM is a going-out SIM or a home SIM (S102). ).

  If it is determined in step S102 that the active SIM is SIM-A 102 and is a going-out SIM (Y in S102), the process proceeds to step S103. On the other hand, if it is determined that the active SIM is SIM-B 103 and is a home SIM (N in S102), the process proceeds to step S106.

  In step S103, the control unit 107 acquires LAN connection information from the LAN wireless unit 104 (S103).

  Here, the method by which the control unit 107 acquires the LAN connection information is as follows. When the LAN wireless unit 104 receives the identification information (beacon signal) transmitted from other base stations at regular intervals, the LAN wireless unit 104 transmits a beacon signal. When the LAN wireless unit 104 and another base station exchange beacon signals and are allowed to connect to each other, the LAN wireless unit 104 and the other base station are connected. Then, the control unit 107 can acquire the identification information of the connection destination of the LAN wireless unit 104 from the LAN wireless unit 104.

  If the beacon signal cannot be exchanged between the LAN wireless unit and the home network base station due to deterioration of the radio reception electric field strength, the connection is disconnected.

  Since the above connection process is generally performed by wireless LAN communication or the like, detailed description thereof is omitted.

  Following step S103, the control unit 107 determines whether or not the connection information acquired by the control unit 107 in step S103 exists in the home network information 113 of the storage unit 108, that is, whether or not the wireless communication device 100 is connected to the home network. Is determined (S104).

  If it is determined in step S104 that it is connected to the network (Y in S104), the control unit 107 switches the SIM used to SIM-B 103, which is a home SIM (S105), and proceeds to step S106. On the other hand, if it is determined in step S104 that it is not connected to the network (N in S104), the process returns to step S103.

  On the other hand, when it is determined in step S102 that the active SIM is not an out-of-home SIM, that is, a home SIM (N in S102), the control unit 107 acquires LAN connection information from the LAN wireless unit 104 when proceeding to step S106 ( S106). The operation in step S106 is the same as that in step S103.

  Then, the control unit 107 determines whether or not the connection information acquired by the control unit 107 in step S106 exists in the home network information 113 of the storage unit 108, that is, whether or not the wireless communication device 100 is connected to the home network. (S107).

  If it is determined in step S107 that it is connected to the home network (Y in S107), the process returns to step S106. On the other hand, if it is determined in step S107 that it is not connected to the home network (N in S107), the control unit 107 acquires monitoring information of the sensor unit 109 (S108). Then, the control unit 107 determines whether or not the wireless communication device 100 is moving based on the monitoring information of the sensor unit obtained in step S108 and the determination criterion of the sensor information of the storage unit 108 (S109).

  Here, an example of a method for determining that the wireless communication device 100 is moving will be described. As a method for determining that the wireless communication device 100 is moving, there is a method for determining that the wireless communication device 100 is moving if the acceleration information of the acceleration sensor fluctuates within a certain time. Alternatively, there is a method of determining that the wireless communication device 100 is moving if position information obtained from GPS (Global Positioning System) changes within a certain time.

  Further, as a determination that the vehicle is moving, it may be determined that the vehicle is moving when both the variation value of the acceleration information and the variation value of the GPS position information exceed a certain value.

  If it is determined in step S109 that the wireless communication device 100 is moving (Y in S109), the control unit 108 switches the used SIM to the SIM-A 102 that is a going-out SIM (S110), and proceeds to step S103. .

  On the other hand, if it is determined in step S109 that the wireless communication device 100 is not moving (N in S109), the process returns to step S106.

  As described above, the wireless communication device 100 according to the present embodiment always uses the low-speed communication SIM card for connection with the PLMN while being connected to the home network.

  When the wireless communication device 100 is not connected to the home network, the wireless communication device 100 does not switch to the SIM card for high speed communication unconditionally, but switches to the SIM card for high speed communication when the wireless communication device 100 moves.

  That is, even if the home network base station is stopped for a certain time by a timer function such as at night, the SIM card for low-speed communication is not switched to the SIM card for high-speed communication unless the wireless communication device 100 moves.

By doing so, the wireless communication device of the present embodiment can switch the SIM by determining whether the user is at home or going out.
[Second Embodiment]
Next, a second embodiment will be described in detail with reference to the drawings.
[Description of configuration]
The diagram showing the configuration of the second embodiment is the same as FIG. 1 showing the configuration of the first embodiment.

The sensor unit 109 in the present embodiment is a sensor that monitors whether the wireless communication device 100 is being charged or not being charged. The method for monitoring whether or not the sensor is being charged is a technique that is generally used in a device that incorporates a storage battery, and therefore will not be described.
[Description of operation]
Next, the operation of the second embodiment will be described with reference to FIG.

  In FIG. 5, step S109 in FIG. 4 showing the operation of the first embodiment is replaced with step S209.

  In the first embodiment, in step S109, the control unit 107 determines whether or not the wireless communication device 100 is moving. On the other hand, in step S209 of the present embodiment, it is determined whether or not the wireless communication device 100 is being charged (S209).

  If the control unit 107 determines that charging is being performed in step S209 (Y in S209), the process returns to step S206. If the control unit 107 determines that charging is not being performed in step S209 (N in S209), the process proceeds to step S210. In step S210, the control unit 107 switches the used SIM to the SIM-A 102 that is a going-out SIM (S210), and proceeds to step S203.

  For example, in the case of a smart phone or the like, charging is generally performed at home, and charging is not performed when going out. Therefore, it is the wireless communication device 100 according to the present embodiment that determines that charging is that the user is at home.

The wireless communication device 100 according to the present embodiment uses the state of charge of the terminal to determine whether to switch from a home SIM to an out-of-home SIM, thereby changing the SIM card switching timing according to the wireless communication device according to the first embodiment. It is possible to carry out more accurately than the above.
[Third Embodiment]
Next, a third embodiment will be described in detail with reference to the drawings.
[Description of configuration]
The diagram showing the configuration of the third embodiment is the same as FIG. 1 showing the configuration of the first embodiment.
[Description of operation]
Next, the operation of the third embodiment will be described with reference to FIG.

  The difference between FIG. 6 and FIG. 4 showing the operation of the first embodiment is that step S305 is added after step S304 corresponding to step S104 in FIG. 4, and step S309 is further added after step S308 corresponding to step S107. Has been added.

First, before using the wireless communication device 100, the user stores information necessary for the storage unit 108 in advance. Information stored in the storage unit 108 is SIM-A information 111, SIM-B information 112, and home network information 113. The information storage method is as described in the description of the operation of the first embodiment. Further, the sensor information 114 is stored in advance in the storage unit 108 as in the description of the operation of the first embodiment. Next, information is stored in the storage unit 108 as described above, and the wireless communication device 100 The operation will be described with reference to the drawings.

  The operation from the start of the operation of the wireless communication device 100 to step S302 is the same as the operation from the start of FIG. 4 to step S102 shown in the first embodiment.

  If it is determined in step S302 that the active SIM is the SIM-A 102 and is a going-out SIM (Y in S302), the process proceeds to step S303. On the other hand, if it is determined that the active SIM is SIM-B 103 and is a home SIM (N in S302), the process proceeds to step S307.

  Steps S303 to S304 are the same as steps S103 to S104 in FIG.

  If it is determined in step S304 that the wireless communication device 100 is not connected to the home network (N in S304), the process returns to step S303.

  If it is determined in step S304 that it is connected to the home network (Y in S304), the control unit 107 acquires the received electric field strength of the radio wave being connected from the LAN wireless unit 104. Then, the control unit 107 determines whether or not the acquired received electric field strength is greater than or equal to a set value of the received electric field strength held in the storage unit 108 in advance (S305).

  If it is equal to or greater than the set value in step S305 (Y in S305), the control unit 107 refers to the SIM-A information 111 and the SIM-B information 112 in the storage unit 108, and the SIM-B 103 which is a home SIM. (S306), the process proceeds to step S307. If it is not greater than the set value in step S305 (N in S305), the process returns to step S303.

  On the other hand, in step S307, the control unit 107 acquires LAN connection information from the LAN wireless unit 104 (S307). The operation in step S307 is the same as the operation in step S103 in FIG. 4 shown in the first embodiment. Then, the control unit 107 determines whether or not the connection information acquired by the control unit 107 in step S307 exists in the home network information 113 of the storage unit 108, that is, whether or not the wireless communication device 100 is connected to the home network. (S308).

  If it is determined in step S308 that it is connected to the home network (Y in S308), the process proceeds to step S309. On the other hand, if it is determined in step S308 that it is not connected to the home network (N in S308), the process proceeds to step S310.

  In step S309, the control unit 107 determines whether or not the acquired received electric field strength is equal to or greater than the set value of the received electric field strength held in the storage unit 108 in advance (S309).

  If it is equal to or greater than the set value in step S309 (Y in S309), the process returns to step S307. If it is not greater than the set value in step S309 (N in S309), the process proceeds to step S310.

  In step S310, the control unit 107 acquires monitoring information of the sensor unit 109 (S310). Then, the control unit 107 determines whether or not the wireless communication device 100 is moving based on the monitoring information of the sensor unit obtained in step S310 and the determination criterion of the sensor information in the storage unit 108 (S311). The determination method in step S311 is the same as that in step S109 of the first embodiment.

  If it is determined in step S311 that the wireless communication device 100 is moving (Y in S311), the control unit 107 switches the used SIM to the SIM-A 102 that is a going-out SIM (S312), and proceeds to step S303. .

  In the first embodiment, in step S104 and step S107, the control unit 107 determines whether or not the wireless communication device 100 is connected to the home network.

  On the other hand, in this embodiment, after it is determined in steps S304 and S308 that the LAN wireless unit 104 is connected to the home network, the determinations in steps S305 and S309 are added. In step S305 and step S309, it is determined whether or not the received electric field strength of the radio wave of the connected home network base station is equal to or higher than a set value.

  By doing so, the following effects can be obtained.

  For example, when the user passes through the neighborhood of the house, the SIM of the wireless communication device 100 should not be switched. In general, even when the user passes through the neighborhood of the house and the wireless communication device 100 is connected to the home network, the received electric field strength of the home network is smaller than that in the house at home. Therefore, if the setting value of the received electric field strength held by the storage unit 108 is set high, even if the user passes in front of the house and the LAN wireless unit 104 temporarily connects to the home network, SIM switching does not occur.

As shown in the present embodiment, it is possible to more accurately determine that the user has returned home by returning to the home by adding determination based on the received electric field strength to the home network connection determination. Become. Therefore, it is possible to perform more appropriate switching according to the SIM switching method shown in the present embodiment than in the SIM switching method shown in the first embodiment.
[Fourth Embodiment]
Next, a fourth embodiment will be described with reference to FIG.

  The communication device 200 shown in the present embodiment selects the first communication condition or the second communication condition and communicates with the first connection destination, and communicates with the second connection destination. And a second communication unit 202 to perform. In addition, the communication device 200 includes a sensor unit 203 that monitors the state of the communication device 200. Further, the communication device 200 includes a control unit 204. Then, when the second communication unit 202 is connected while the first communication unit 201 is connected using the first communication condition, the control unit 204 switches to the second communication condition. Further, the control unit 204 includes a predetermined state including the state of the communication device 200 when the second communication unit 202 is not connected while the first communication unit 201 is connected using the second communication condition. Based on the above condition, the first communication condition is switched.

  By doing so, the wireless communication device 200 can automatically switch to the SIM card for high-speed communication when the user goes out and communicate with the PLMN by switching to the SIM card for low-speed communication when at home.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and can be expanded or modified as follows.

  For example, a wireless communication apparatus that operates according to the flowchart of FIG. 8 is shown as a modification. In FIG. 8, the determination in step S311 in the operation of the third embodiment shown in FIG. 6 is replaced with the determination in step S411. This brings about the same effect as replacing step S109 in FIG. 4 shown in the first embodiment with step S209 in FIG. 5 shown in the second embodiment.

  Therefore, the wireless communication device according to the present modification uses the state of charge of the wireless communication device to determine whether to switch from the home SIM to the going-out SIM, so that the SIM can be compared with the wireless communication device shown in the third embodiment. Card switching can be performed more accurately.

  Furthermore, the user may be able to select either the operation of the third embodiment or the above modification. FIG. 9 shows a specific image of the display unit 105 when the user selects either the operation shown in the third embodiment or the operation of the modified example.

  Further, the wireless communication devices described in the embodiments and the modifications so far may be wired communication devices. In this case, the WAN wireless unit is configured as a wired WAN communication unit, and the LAN wireless unit is configured as a wired LAN communication unit.

100 wireless communication device 101 WAN wireless unit 102 SIM-A
103 SIM-B
104 LAN wireless unit 105 Display unit 106 Input unit 107 Control unit 108 Storage unit 109 Sensor unit 111 SIM-A information 112 SIM-B information 113 Home network information 114 Sensor information 200 Communication device 201 First communication unit 202 Second communication Unit 203 sensor unit 204 control unit

Claims (10)

In communication equipment,
A first communication unit that selects the first communication condition or the second communication condition and communicates with the first connection destination;
A second communication unit that communicates with the second connection destination;
When the second communication unit is connected while the sensor unit that monitors the state of the communication device and the first communication unit is connected using the first communication condition, the second communication unit is switched to the second communication condition, When the first communication unit is connected using the second communication condition and the second communication unit is not connected, the communication unit switches to the first communication condition based on a predetermined condition including the state of the communication device. A communication device comprising a control unit. In communication equipment,
A first communication unit that selects the first communication condition or the second communication condition and communicates with the first connection destination;
A second communication unit that communicates with the second connection destination;
The sensor unit for monitoring the state of the communication device and the second communication unit connected while the first communication unit is connected using the first communication condition, and the received electric field strength of the second communication unit Is switched to the second communication condition if is equal to or greater than a predetermined value,
If the second communication unit is not connected while the first communication unit is connected using the second communication condition, the first communication is performed based on a predetermined condition including a state of the communication device. Switch to the condition,
When the second communication unit is connected while the first communication unit is connected using the second communication condition, and the received electric field strength of the second communication unit is smaller than a predetermined value, the communication device And a control unit that switches to the first communication condition based on a predetermined condition including the state of the communication. The state of the communication device includes any of acceleration, location, and charging status,
The predetermined condition is that the acceleration is greater than or equal to a predetermined value within a predetermined time, the variation in the location is greater than or equal to a predetermined value within a predetermined time, or the charging status is being charged. 3. The communication device according to claim 1, wherein a proposition included in the proposition is satisfied. The first connection destination;
The second connection destination;
A communication system comprising the communication device according to any one of claims 1 to 3.   When the second communication unit is connected while the first communication unit is connected using the first communication condition, the first communication unit is switched to the second communication condition, and the first communication unit is connected using the second communication condition. When the second communication unit is not connected, the communication method is switched to the first communication condition based on a predetermined condition. If the second communication unit is connected while the first communication unit is connected using the first communication condition, and the received electric field strength of the second communication unit is equal to or greater than a predetermined value, the second communication condition Switch to
When the second communication unit is not connected while the first communication unit is connected using the second communication condition, the first communication unit is switched to the first communication condition based on a predetermined condition,
When the second communication unit is connected while the first communication unit is connected using the second communication condition, and the received electric field strength of the second communication unit is smaller than a predetermined value, the predetermined condition And switching to the first communication condition based on the communication method.   The communication method according to claim 5, wherein the predetermined condition satisfies either one of the communication device being moving or being charged, or both.   When the second communication unit is connected while the first communication unit is connected using the first communication condition, the first communication unit is switched to the second communication condition, and the first communication unit is connected using the second communication condition. When the second communication unit is not connected, the program for the communication device is switched to the first communication condition based on a predetermined condition. If the second communication unit is connected while the first communication unit is connected using the first communication condition, and the received electric field strength of the second communication unit is equal to or greater than a predetermined value, the second communication condition Switch to
When the second communication unit is not connected while the first communication unit is connected using the second communication condition, the first communication unit is switched to the first communication condition based on a predetermined condition,
When the second communication unit is connected while the first communication unit is connected using the second communication condition, and the received electric field strength of the second communication unit is smaller than a predetermined value, the predetermined condition And switching to the first communication condition based on the program.   11. The communication device program according to claim 9, wherein the predetermined condition satisfies that the communication device is moving, charging, or both. 11. .

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