Communication Terminal and Position Detection System

A communication terminal comprising:

• a memory in which identification information associated with a user is stored;
• a controller that obtains a result of authentication of the user from a device that carries out user authentication;
• and
• a communication interface that transmits a signal including the identification information, wherein
• the controller
• prevents transmission of the signal by the communication interface when authentication of the user is not successful, and
• does not prevent transmission of the signal by the communication interface when authentication of the user is successful.

A position detection system comprising:

• a first communication terminal;
• a second communication terminal that communicates with the first communication terminal;
• and
• a server apparatus, wherein
• the first communication terminal includes
• a first memory in which identification information associated with a user is stored,
• a controller that carries out authentication of the user, and
• a communication interface that transmits a signal including the identification information,
• the controller
• sets, when authentication of the user is successful, the first communication terminal to a first state in which the signal is transmitted to the second communication terminal, and
• sets, when authentication of the user is not successful, the first communication terminal to a second state in which the signal is not transmitted to the second communication terminal,
• the second communication terminal includes a second memory in which apparatus information for identifying the second communication terminal is stored,
• the second communication terminal transmits the identification information and the apparatus information to the server apparatus in response to reception of the identification information from the first communication terminal, and
• the server apparatus specifies that the user specified by the identification information is located at a location corresponding to the second communication terminal specified by the apparatus information in response to reception of the identification information and the apparatus information from the second communication terminal.

A position detection system comprising:

• a first communication terminal;
• a second communication terminal that communicates with the first communication terminal;
• a third communication terminal that communicates with the first communication terminal;
• and
• a server apparatus, wherein
• the first communication terminal includes a first memory in which identification information associated with a user is stored,
• the third communication terminal carries out user authentication,
• the first communication terminal includes
• a controller that obtains a result of the user authentication from the third communication terminal, and
• a communication interface that emits a signal including the identification information,
• the controller
• prevents transmission of the signal by the communication interface when the user authentication is not successful, and
• does not prevent transmission of the signal by the communication interface when the user authentication is successful,
• the second communication terminal includes a second memory in which apparatus information for identifying the second communication terminal is stored,
• the second communication terminal transmits the identification information and the apparatus information to the server apparatus in response to reception of the identification information from the first communication terminal, and
• the server apparatus specifies that the user specified by the identification information is located at a location corresponding to the second communication terminal specified by the apparatus information in response to reception of the identification information and the apparatus information from the second communication terminal.