Communication apparatus

A communication apparatus capable of performing communication in a plurality of communication modes including a first communication mode of wirelessly communicating with a terminal apparatus via an external wireless base station and a second communication mode of wirelessly communicating with the terminal apparatus without intervention of the external wireless base station, comprising:

• a communication unit configured to execute a first authentication method used in communication in the first communication mode, and a second authentication method different from the first authentication method, used in communication in the first communication mode, and using an authentication server;
• and
• a control unit configured to control the communication unit,
• wherein when executing connection to the terminal apparatus in the second communication mode,
• if it is determined that an authentication method in the first communication mode is the second authentication method, the control unit controls the communication unit to be able to use the second communication mode out of the first communication mode and the second communication mode, and
• if it is determined that the authentication method in the first communication mode is the first authentication method, the control unit controls the communication unit to be able to use both the first communication mode and the second communication mode.

A communication apparatus capable of performing communication in a plurality of communication modes including a first communication mode of wirelessly communicating with a terminal apparatus via an external wireless base station and a second communication mode of wirelessly communicating with the terminal apparatus without intervention of the external wireless base station, comprising:

• a communication unit configured to execute a first authentication method used in communication in the first communication mode, and a second authentication method different from the first authentication method, used in communication in the first communication mode, and using an authentication server;
• and
• a control unit configured to control the communication unit,
• wherein as an operation state of the communication apparatus, a first state in which the first authentication method is executable and the second authentication method is not executed and a second state in which the first authentication method is executable and the second authentication method is executable are included, and
• when switching the second state to the first state,
• if it is determined that an authentication method in the first communication mode is the second authentication method, the control unit controls the communication unit to initialize connection information to the wireless base station to be used in the first communication mode, and
• if it is determined that the authentication method in the first communication mode is the first authentication method, the control unit controls the communication unit not to initialize the connection information to the wireless base station to be used in the first communication mode.

A communication apparatus capable of performing communication in a plurality of communication modes including a first communication mode of wirelessly communicating with a terminal apparatus via an external wireless base station and a second communication mode of wirelessly communicating with the terminal apparatus without intervention of the external wireless base station, comprising:

• a communication unit configured to execute a first authentication method used in communication in the first communication mode, and a second authentication method different from the first authentication method, used in communication in the first communication mode, and using an authentication server;
• a control unit configured to control the communication unit;
• and
• a determination unit configured to determine to search for a wireless base station of the first authentication method or the second authentication method,
• wherein as an operation state of the communication apparatus, a first state in which the first authentication method is executable and the second authentication method is not executed and a second state in which the first authentication method is executable and the second authentication method is executable are included, and
• when searching for a wireless base station, if the determination unit determines to search for a wireless base station of the second authentication method, the control unit controls the communication unit to
• execute no search for the wireless base station of the second authentication method in the first state, and
• execute the search for the wireless base station of the second authentication method in the second state.