Patent ID: 8380168

Claim:
A communication system including an access point apparatus connectable with a network and a communication terminal wirelessly communicable with the access point apparatus, the communication system comprising a processor and storage section in the communication terminal and a processor and storage section in the access point, wherein programs are stored in the storage sections to cause the communication system to perform the following steps: a connection request step performed by the processor in the communication terminal for transmitting a connection request including identification information for identifying the communication terminal to the access point apparatus, wherein the connection request is transmitted by the communication terminal to the access point apparatus to establish a wireless connection between the network and the communication terminal and the transmission of the connection request occurs before the access point or network requests information from the communication terminal to establish the wireless connection; a selection step performed by the processor in the access point apparatus to allow a user to select whether or not to permit connection with the communication terminal in response to the connection request transmitted from the communication terminal; a registration step performed by the processor in the access point apparatus for, when the user has selected to permit the connection with the communication terminal, registering the identification information of the communication terminal in a registration list stored in the access point apparatus; a connection permission step performed by the processor in the access point apparatus for, when the user has selected to permit the connection with the communication terminal, transmitting a connection response which represents permission of the connection to the communication terminal; an authentication request step performed by the processor in the communication terminal for transmitting an authentication request which includes the identification information for identifying the communication terminal and requests authentication processing to be executed with the access point apparatus, in response to the connection response representing the permission of the connection being transmitted from the access point apparatus; an authentication request response step performed by the processor in the access point apparatus for determining whether or not the identification information included in the authentication request transmitted from the communication terminal is registered in the registration list and, when a result of the determination is affirmative, transmitting a response to the authentication request to the communication terminal; and an authentication processing step performed by the processor in the communication terminal for, when the response to the authentication request is received, executing authentication processing with the access point apparatus for establishing the wireless connection.