COMMUNICATION DEVICE, COMMUNICATION DEVICE CONTROL METHOD, AND PROGRAM

Abstract

To determine a form of communication regarding dual connectivity (DC) in accordance with a remaining battery capacity of a communication device.SOLUTION: A communication device disconnects from a 5G base station and controls communication to be performed via an LTE base station of an LTE network that performs communication compliant with LTE, which is a 3GPP standard when the value of the remaining battery capacity of the communication device falls to or below a predetermined threshold value in a state where the communication device is connected to a 5G base station of a 5G network that performs communication compliant with 5G, which is the 3GPP standard and maintains communication with the 5G base station.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a communication device, a control method for a communication device, and a program. [Background technology]

[0002] The 3GPP (3rd Generation Partnership Project) Release 12 (Rel-12) specification defines dual connectivity (DC), which allows simultaneous communication with multiple base stations. With dual connectivity, a user equipment (UE) can simultaneously transmit using component carriers (CCs) provided by multiple base stations, thereby improving user throughput (see Patent Document 1). Specifically, the UE divides one Evolved Packet System (EPS) bearer or packet sequence and simultaneously transmits each divided packet sequence to CCs provided by multiple base stations. More specifically, the UE transmits the divided packet sequence to a master base station acting as a master node (MN) and a secondary base station acting as a secondary node (SN). After receiving packets, the master base station or secondary base station reconstructs the packet sequence from the UE by reordering the packet sequence received by itself and the packet sequence received from the other base station. After reconstructing the packet sequence, the master base station or secondary base station forwards the reconstructed packet sequence to a core node (CN).

[0003] Additionally, 5G, the next-generation communications standard currently being developed by 3GPP, also specifies that DC can be used in non-standalone mode, where 5G and LTE (Long Term Evolution), which are different wireless technologies, work together. This will enable UE to simultaneously perform LTE and 5G communications, improving user throughput. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-127383 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, when a UE simultaneously performs LTE and 5G communications, DC is expected to improve performance. However, it is also expected that power consumption will increase due to the simultaneous use of communication circuits for multiple methods for data communications. For example, when a digital camera serving as a UE simultaneously performs LTE and 5G communications to upload captured images to a server, the battery may run out earlier than when only LTE communications are used. In other words, if the digital camera always keeps DC activated, the battery may run out earlier. This will make the digital camera's primary function of capturing images unavailable, resulting in a decrease in user convenience.

[0006] In such cases, the digital camera may consider stopping DC and continuing LTE communication only to reduce power consumption while maintaining communication. However, since the throughput of LTE communication is approximately one-tenth of that of 5G communication, it is expected that it will take a significant amount of time to complete data communication using LTE communication alone. In such situations, digital camera users are unable to terminate data communication at their own will, making it difficult to use. Note that a similar problem can occur when downloading captured images.

[0007] The present invention has been made in view of the above-mentioned problems, and has an object to determine a communication mode relating to dual connectivity (DC) in accordance with the remaining battery power of a communication device. [Means for solving the problem]

[0008] As one means for achieving the above object, a communication device of the present invention comprises: an imaging means for performing imaging processing to generate imaging data;The communication device is 3GPP standard The LTE base station of the LTE network conforming to LTE is set as the master base station, 5G base station of a 5G network that performs 5G-compliant communications The cellular network is connected to the base station of the cellular network using dual connectivity technology, which uses the secondary base station as a secondary base station. connection a connection means for connecting the communication device to the communication terminal, a communication means for performing data communication using a dual connection established by the connection means, a display control means for displaying a display item when a value of a remaining battery charge of the communication device becomes equal to or less than a predetermined threshold, and A control means for disconnecting the connection with the 5G base station and controlling communication to be performed via an LTE base station of an LTE network that performs communication in accordance with the LTE standard, which is the 3GPP standard. and, Equipped with The data communication executed by the communication means using the dual connection includes data communication related to a data transfer function for uploading imaging data generated by imaging processing by the imaging means to an external device, and the predetermined condition is a condition in which the remaining battery level of the communication device falls below a predetermined threshold while maintaining dual connection with the LTE base station and the 5G base station, and a user operation for selecting the display item is accepted, and when the predetermined condition is satisfied, the control means further stops the data communication related to the data transfer function for uploading the imaging data to the external device. . [Effects of the Invention]

[0009] According to the present invention, it is possible to determine the communication mode for DC depending on the remaining battery power of the communication device, thereby making it possible to improve usability for users compared to conventional methods. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing an example of the hardware configuration of a digital camera according to an embodiment. [Figure 2] FIG. 2 is a diagram showing an example of the software functional configuration of a digital camera according to an embodiment. [Figure 3] FIG. 1 is a diagram showing an example of a network configuration according to an embodiment. [Figure 4] FIG. 4 is an operational flow diagram of processing when DC is stopped in the first embodiment. [Figure 5] FIG. 10 is a diagram showing an example of a screen for confirming whether or not to continue the transfer of imaging data in the first embodiment. [Figure 6] FIG. 10 is a diagram showing another example of a screen for confirming whether or not to continue the transfer of captured image data in the first embodiment. [Figure 7] FIG. 3 is an operational sequence diagram of the digital camera and the LTE base station according to the first embodiment. [Figure 8] FIG. 11 is an operational flow diagram of processing when DC is stopped in the second embodiment. [Figure 9] FIG. 10 is a diagram showing another example of a screen for confirming whether or not to continue the transfer of imaging data in the second embodiment. [Figure 10]FIG. 10 is an operational sequence diagram of a digital camera and an LTE base station according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the present invention will be described in detail based on an example of an embodiment with reference to the accompanying drawings. Note that the configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

[0012] [First embodiment] (Network configuration) An example of a network configuration of this embodiment is shown in FIG. 3. The network configuration shown in FIG. 3 includes a digital camera 301, an LTE base station 302, and a 5G base station 303. The LTE base station 302 is capable of communicating according to an LTE communication method conforming to the 3GPP standard, and the 5G base station 303 is capable of communicating according to a 5G communication method conforming to the 3GPP standard. The digital camera 301, which is a UE, is located within the cells (within communication ranges) of the LTE base station 302 and the 5G base station 303 and supports dual connectivity (DC) capability, which allows simultaneous communication with these base stations. In this embodiment, the digital camera 301 transmits imaging data to the LTE base station 302 and the 5G base station 303 using DC in order to upload the imaging data to a network device (not shown), such as a server, connected to the core network 304. The LTE base station 302 and the 5G base station 303 transmit the imaging data received from the digital camera 301 to a network device (not shown) connected to the core network 304.

[0013] In this embodiment, the LTE base station 302 functions as a master base station (MN), and the 5G base station 303 functions as a secondary base station (SN). In DC communication, the LTE base station 302, which is the master base station, controls simultaneous communication between the digital camera 301 and the LTE base station 302 and 5G base station 303, and also controls communication with the upper core network 304.

[0014] (Digital camera configuration) FIG. 1 shows an example of the hardware configuration of a digital camera 301 according to this embodiment. The digital camera includes, as an example of its hardware configuration, a control unit 101, a storage unit 102, a wireless communication unit 103, a display unit 104, an antenna control unit 105, an antenna 106, an input unit 107, and an imaging unit 108. The control unit 101 executes a control program stored in the storage unit 102 to control the entire digital camera 301. The storage unit 102 stores the control program executed by the control unit 101, as well as various information such as imaging data, communication parameters, and authentication information. The communication parameters and authentication information can be used when connecting to an LTE base station 302 or a 5G base station 303. The control unit 101 executes the control program stored in the storage unit 102 to perform various operations of the digital camera 301, which will be described later. The wireless communication unit 103 performs cellular network communication such as LTE or 5G, or wireless communication such as Wi-Fi. The display unit 104 has a function capable of outputting visually recognizable information using an LCD or LED, or a function capable of outputting sound using a speaker, and displays various information. The antenna control unit 105 controls the antenna 106 for wireless communication. The input unit 107 has an operation function for operating the digital camera 301, and accepts various inputs / operations by the user. The input unit 107 and the display unit 104 may be configured as a user interface (UI) by functioning together in combination. The imaging unit 108 has an imaging function, performs imaging processing, and generates imaging data.

[0015] 2 shows an example of the software functional configuration of a digital camera 301 according to this embodiment. The digital camera has, as an example of its software functional configuration, a transmitting unit 201, a receiving unit 202, a connection control unit 203, a determining unit 204, a display control unit 205, and a data transfer control unit 206.

[0016] The transmitter 201 and the receiver 202 each transmit signals (e.g., various messages / information and imaging data) to the opposing device via the wireless communication unit 103, and receive signals (e.g., various messages / information). The connection control unit 203 controls and manages connections with the LTE base station 302 and the 5G base station 303 via transmission and reception of predetermined signals by the transmitter 201 and the receiver 202. The determination unit 204 performs communication maintenance determination processing, which is processing for determining whether or not it is necessary to maintain communication with the LTE base station 302, based on predetermined conditions, when communication with the LTE base station 302 is continuing. The display control unit 205 controls display on the display unit 104. Furthermore, when the display unit 104 functions both as the input unit 107 and a UI, the display control unit 205 may control the UI. The data transfer control unit 206 controls and manages data communication (data transfer) of imaging data stored in the storage unit 102. In the following description, data may be treated as a data file.

[0017] Here, an example of communication continuation determination processing by the determination unit 204 will be described. As one example, the determination unit 204 can confirm whether or not cellular network communication is required for the digital camera 301. As a specific example, the determination unit 204 can confirm whether or not the control unit 101 is executing an application (service) that requires cellular network communication. Such an application includes, for example, an application for remotely operating the digital camera 301 via cellular network communication. In this case, the determination unit 204 can determine that continuation of communication with the LTE base station 302 is required when the control unit 101 is executing the application (service). In other words, the determination unit 204 can determine that continuation of communication with the LTE base station 302 is not required when the control unit 101 is not executing the application (service). As another example, the determination unit 204 can confirm whether or not the remaining time required for transfer of the imaging data is equal to or less than a predetermined time (predetermined value) when imaging data is being transferred under the control of the data transfer control unit 206. In this case, if the remaining time is equal to or less than the predetermined time, the determination unit 204 determines that it is necessary to continue communication with the LTE base station 302, and in other cases, it can determine that it is not necessary to continue communication with the LTE base station 302. The remaining time can be calculated by the data transfer control unit 206 from the remaining amount of imaging data to be transferred and the average throughput in communication with the LTE base station 302 so far.

[0018] (Processing flow) Next, the operation of the digital camera 301 in this embodiment will be described with reference to FIG. 4. FIG. 4 is a flowchart of processing when DC is stopped in this embodiment. The processing shown in FIG. 4 can be started in response to the control unit 101 deciding to stop DC communication when the digital camera 301 is performing DC communication and transferring imaging data. The decision to stop DC communication can be made, for example, in response to the control unit 101 detecting that the remaining battery power of the digital camera 301 has fallen below a predetermined value during DC communication. Furthermore, in the case where the control unit 101 is executing an application for transferring imaging data, the control unit 101 may decide to stop DC communication at an appropriate timing in the program of the application being executed. Furthermore, the control unit 101 may decide to stop DC communication in response to a user instruction via the input unit 107.

[0019] First, in S401, the connection control unit 203 performs processing to stop 5G communication with the 5G base station 303 (SN). At this time, the connection control unit 203 can control the state of the digital camera 301. For example, the connection control unit 203 may transition the state of the digital camera 301 to an RRC Idle state, which means a standby state as a 5G UE state. Alternatively, the connection control unit 203 may transition the state of the digital camera 301 to an RRC Inactive state, which means an intermediate state between standby and connected as a 5G UE state. Alternatively, the connection control unit 203 may transition the state of the digital camera 301 to a state in which it does not have a state as a 5G UE by completely stopping the 5G communication function of the digital camera 301.

[0020] After the connection control unit 203 stops the 5G communication with the 5G base station 303, the transmission unit 201 notifies the LTE base station (MN) that the 5G communication with the 5G base station 303 has been stopped (S402). Here, the transmission unit 201 may, for example, transmit a link failure information message to the LTE base station 302, or may also transmit a message indicating that communication with the LTE base station 302 has been stopped.

[0021] Next, in S403, the determination unit 204 performs communication maintenance determination processing to determine whether or not it is necessary to maintain communication with the LTE base station 302 (communication with the MN). The communication maintenance determination processing is as described above. If it is determined that it is necessary to maintain communication with the LTE base station 302 (Yes in S404), the connection control unit 203 terminates the processing while maintaining communication with the LTE base station 302. On the other hand, if it is determined that it is not necessary to maintain communication with the LTE base station 302 (No in S404), the processing proceeds to S405. In S405, the display control unit 205 displays a screen on the display unit 104 to confirm whether or not to continue the imaging data transfer, and confirms with the user whether or not to continue the imaging data transfer.

[0022] 5 and 6 show examples of screens for confirming whether or not to continue the imaging data transfer. In FIG. 5, a screen including the sentence "Do you want to continue data transfer via LTE communication?" is displayed to confirm whether or not to continue the imaging data transfer to the user. In FIG. 6, a screen including the remaining time required for the imaging data transfer, calculated by the data transfer control unit 206 using the method described above, is displayed to confirm whether or not to continue the imaging data transfer to the user. In both examples of the screens in the figures, if the user selects "Yes" via the input unit 107, the connection control unit 203 terminates the process while maintaining communication with the LTE base station 302. On the other hand, if "No" is selected, the data transfer control unit 206 terminates the imaging data transfer, and the connection control unit 203 terminates the LTE communication with the LTE base station 302 (communication with the MN) (S407), and terminates the process.

[0023] After LTE communication is stopped in S405, the connection control unit 203 can control the state of the digital camera 301. For example, the connection control unit 203 may transition the state of the digital camera 301 to an RRC Idle state, which means a standby state as an LTE UE state. Alternatively, the connection control unit 203 may transition the state of the digital camera 301 to a state in which the digital camera 301 does not have a state as an LTE UE by completely stopping the LTE communication function.

[0024] Note that if the control unit 101 is running multiple applications for imaging data transfer, or if the data transfer control unit 206 is performing multiple types of imaging data transfer processes, confirmation processing may be performed for all types of imaging data transfer processes in S405. In this case, if continuation of communication with the LTE base station 302 is not selected for all types of imaging data transfer processes in the subsequent S406, the connection control unit 203 may stop communication with the LTE base station 302 and end the processing.

[0025] Next, the flow of signals when DC is stopped in this embodiment will be described with reference to Fig. 7. Fig. 7 shows the sequence of processing operations when DC is stopped, which are carried out between the digital camera 301 and the LTE base station 302. Note that the description of Fig. 7 is based on the premise that it is not predetermined that cellular network communication is required for communication by the digital camera 301.

[0026] If the remaining battery power of the digital camera 301 falls below a predetermined value while the digital camera 301 is performing DC communication, the DC stop processing described in FIG. 4 is initiated, and the digital camera 301 stops communication with the 5G base station 303 (F701, S401). After communication with the 5G base station 303 is stopped, the digital camera 301 transmits a link failure information (Link Failure Information) message to the LTE base station 302 notifying the LTE base station 302 that communication with the 5G base station 303 has been stopped (F702, S402). Upon receiving the link failure information message, the LTE base station 302 performs processing to stop DC communication and transmits an RRC connection reconfiguration message to the digital camera 301, notifying that the connection settings with the base station have been updated (F703). In response to the RRC connection reconfiguration message, the digital camera 301 transmits an RRC connection reconfiguration complete (Complete) message to the LTE base station 302 (F704).

[0027] If the digital camera 301 determines that it is not necessary to maintain communication with the LTE base station 302 (No in S404), it asks the user whether or not to continue transferring the captured image data (F705, S405). If the user selects not to continue transferring the captured image data (No in F706, S406), the digital camera 301 stops communication with the LTE base station 302 (F707, S407).

[0028] As described above, according to this embodiment, when DC communication is stopped, the user can select whether or not the digital camera 301 should maintain communication with the LTE base station 302 (MN). This allows the user to decide to disconnect communication with the LTE base station 302 if communication at low throughput does not suit the user's wishes, resulting in improved user convenience.

[0029] [Second embodiment] In the above first embodiment, a method has been described in which the digital camera 301 confirms whether the user continues communication with the LTE base station 302 after performing communication maintain determination processing with the LTE base station 302. Hereinafter, as a second embodiment, a method will be disclosed in which the digital camera 301 determines whether to maintain communication with the LTE base station 302 and the 5G base station 303 after the user confirms whether to maintain communication with the LTE base station 302. Note that the following will describe differences from the first embodiment.

[0030] (Processing flow) The operation of the digital camera 301 in this embodiment will be described with reference to FIG. 8. FIG. 8 is a flowchart of processing when DC is stopped in this embodiment. The processing shown in FIG. 8 can be started in response to the control unit 101 deciding to stop DC communication when the digital camera 301 is performing DC communication and transferring imaging data. The decision to stop DC communication can be made, for example, in response to the control unit 101 detecting that the remaining battery power of the digital camera 301 has fallen below a predetermined value during DC communication. Furthermore, in the case where the control unit 101 is executing an application for transferring imaging data, the control unit 101 may decide to stop DC communication at an appropriate timing in the program of the application being executed. Furthermore, the control unit 101 may decide to stop DC communication in response to a user instruction via the input unit 107.

[0031] First, in S801, the display control unit 205 displays a screen on the display unit 104 to confirm whether or not to continue the imaging data transfer, and confirms with the user whether or not to continue the imaging data. FIG. 9 shows an example of a screen for confirming whether or not to continue the imaging data transfer. In FIG. 9, a screen including the sentence "Do you want to end data transfer?" is displayed to confirm with the user whether or not to continue the imaging data transfer. If "Yes" is selected by the user via the input unit 107 on the screen shown in FIG. 9, the connection control unit 203 terminates the processing while maintaining communication with the LTE base station 302. On the other hand, if "No" is selected, the data transfer control unit 206 terminates the imaging data transfer, and the connection control unit 203 terminates 5G communication with the 5G base station 303 (SN) (S803).

[0032] After the connection control unit 203 stops the 5G communication with the 5G base station 303, the transmission unit 201 notifies the LTE base station (MN) that the 5G communication with the 5G base station 303 has been stopped (S804). Subsequently, in S805, the determination unit 204 performs communication maintenance determination processing to determine whether or not it is necessary to maintain communication with the LTE base station 302. The communication maintenance determination processing is as described above. However, because the transfer of the imaging data has ended in S803, the determination unit 204 may determine whether or not it is necessary to maintain communication with the LTE base station 302 based on, for example, whether the control unit 101 is executing an application (service) that requires cellular network communication. If it is determined that it is necessary to maintain communication with the LTE base station 302 (Yes in S806), the connection control unit 203 ends the processing while maintaining communication with the LTE base station 302. On the other hand, if it is determined that maintaining communication with the LTE base station 302 is not necessary (No in S806), the connection control unit 203 stops LTE communication with the LTE base station 302 (communication with the MN) (S807) and terminates the processing.

[0033] Next, the signal flow when DC is stopped in this embodiment will be described with reference to Fig. 10. Fig. 10 shows the sequence of processing operations when DC is stopped, which are carried out between the digital camera 301 and the LTE base station 302. Note that the description of Fig. 10 is based on the premise that the digital camera 301 has not been previously determined to require cellular network communication.

[0034] 9 is initiated when the remaining battery power falls below a predetermined value while the digital camera 301 is performing DC communication, and the digital camera 301 asks the user whether to continue transferring captured image data (F1001, S801). If the user selects not to continue transferring captured image data (No in F1002, S802), the digital camera 301 ends the transfer of captured image data and stops communication with the 5G base station 303 (F1003, S803). After communication with the 5G base station 303 is stopped, the digital camera 301 transmits a link failure information (Link Failure Information) message to the LTE base station 302 notifying the LTE base station 302 that communication with the 5G base station 303 has been stopped (F1004). Upon receiving the link failure information message, the LTE base station 302 performs processing to stop DC communication and transmits an RRC connection reconfiguration message to the digital camera 301, informing the digital camera 301 of an update to the connection settings with the base station (F1005).

[0035] In response to the RRC connection reconfiguration message, the digital camera 301 transmits an RRC connection reconfiguration completion (Complete) to the LTE base station 302 (F1006). If the digital camera 301 determines that it is not necessary to maintain communication with the LTE base station 302 (No in S806), the digital camera 301 stops communication with the LTE base station 302 (F1007, S807).

[0036] As described above, according to this embodiment, the digital camera 301 can determine whether to maintain communication with the LTE base station 302 (MN) and the 5G base station 303 (SN) after confirming whether to continue data transfer. This makes it possible to continue data transfer without stopping communication with the 5G base station if the user prioritizes communication for data transfer over power consumption.

[0037] In the above-described embodiment, the MN is an LTE base station and the SN is a 5G base station, but this is not limiting. The MN may be a 5G base station and the SN may be an LTE base station. In this case, the present embodiment can be applied by replacing the 5G base station and the LTE base station, respectively.

[0038] Furthermore, in the embodiment described above, the case where the digital camera 301 uploads imaging data has been described, but the above processing can also be applied to a case where the digital camera 301 downloads imaging data. The amount of data to be downloaded may be predetermined, for example, known to the digital camera 301. In this case, the transfer of imaging data in the embodiment described above is replaced by the downloading of imaging data, and processing is performed.

[0039] Furthermore, in the above-described embodiment, the user is asked whether or not to continue transferring image data when communication with the 5G base station 303 (SN) is stopped (DC communication is stopped), but the timing of the confirmation is not limited to this. For example, the user may set in advance in the digital camera 301 whether or not to continue transferring image data. Furthermore, in the above-described embodiment, the confirmation is performed via a screen (such as that shown in FIG. 5, FIG. 6, or FIG. 9), but the confirmation may be performed in any manner without using such a screen.

[0040] [Other embodiments] The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program.The present invention can also be realized by a circuit (e.g., ASIC) that realizes one or more functions. [Explanation of symbols]

[0041] 301 Digital camera, 302 LTE base station, 303 5G base station

Claims

1. A communication device, an imaging means for performing imaging processing to generate imaging data; A connection means for connecting the communication device to a cellular network using a dual connectivity technology that establishes a dual connection to a base station of the cellular network, with an LTE base station of an LTE network that complies with the 3GPP standard as a master base station and a 5G base station of a 5G network that performs communication in accordance with 5G as a secondary base station; a communication means for performing data communication using a dual connection established by the connection means; a display control means for displaying a display item when a remaining battery charge value of the communication device becomes equal to or less than a predetermined threshold; A control means for disconnecting the connection with the 5G base station when a predetermined condition is satisfied, and controlling communication so that communication is performed via an LTE base station of an LTE network that performs communication in accordance with LTE, which is the 3GPP standard; Equipped with the data communication executed by the communication means using the dual connection includes data communication related to a data transfer function of uploading imaging data generated by imaging processing by the imaging means to an external device; The specified condition is that the remaining battery charge value of the communication device falls below a specified threshold while maintaining a dual connection with the LTE base station and the 5G base station, and a user operation to select the display item is accepted, and when the specified condition is met, the control means further stops the data communication related to the data transfer function that uploads the imaging data to the external device.

2. A communication device as described in claim 1, wherein the display control means displays a battery indicator together with the display item, the battery indicator indicating information regarding the battery of the communication device.

3. The communication device described in Claim 2, characterized in that the battery indicator is displayed together with a number indicating the remaining battery level.

4. 4. The communication device according to claim 1, further comprising an antenna and a speaker.

5. A method for controlling a communication device, comprising: performing imaging processing to generate imaging data; The communication device connects to the cellular network using a dual connectivity technology that performs dual connection to a base station of the cellular network, with an LTE base station of an LTE network that complies with the 3GPP standard as a master base station and a 5G base station of a 5G network that performs communication that complies with 5G as a secondary base station; performing data communication using the connected dual connections; displaying a display item when a remaining battery charge value of the communication device becomes equal to or less than a predetermined threshold; When a predetermined condition is satisfied, the connection with the 5G base station is disconnected and communication is performed via an LTE base station of an LTE network that performs communication in accordance with the LTE standard, which is the 3GPP standard; and the data communication performed using the dual connection includes data communication related to a data transfer function for uploading the imaging data generated by the imaging process to an external device; The control method is characterized in that the specified condition is that the remaining battery charge value of the communication device falls below a specified threshold while maintaining a dual connection with the LTE base station and the 5G base station, and that a user operation to select the display item is accepted, and when the specified condition is met, the control method further controls to stop the data communication related to the data transfer function that uploads the imaging data to the external device.

6. A program for causing a computer to function as the communication device according to any one of claims 1 to 4.

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