Controlling supply of power to a communication unit of a communication device based on user's activity of image capturing and transferring on the communication device

A communication device, comprising:

• an image capturing unit having an image sensor configured to capture an image of a subject;
• an operation unit having a user manipulated input device configured to receive a user input;
• a communicating unit having a communication interface, wherein the communication interface communicates with another electronic device;
• and
• a controller configured to control a supply of power to the communicating unit, wherein
• the controller:
• intermittently controls the supply of power to the communicating unit by keeping the supply of power to the communicating unit during a first time period and stopping the supply of power to the communicating unit during a second time period, and
• determines whether the other electronic device is connected to the communication device through the communicating unit within the first time period,
• when the other electronic device is connected to the communication device through the communicating unit within the first time period, the controller keeps the supply of power to the communicating unit,
• when the other electronic device is not connected to the communication device through the communicating unit within the first time period, the controller stops the supply of power to the communicating unit during the second time period after the first time period elapses;
• and
• when the supply of power to the communicating unit is stopped, the controller automatically starts the supply of power to the communication unit according to at least one of the following predetermined conditions:
• the image capturing unit captures the image of the subject;
• or
• the operation unit receives a user input for selecting a captured image to be sent to the other electronic device.