Patent ID: 8656027

Claim:
A wireless communication system in which a wireless communication apparatus sends a disconnection frame to an opposite apparatus during connection and a disconnection process is executed, the wireless communication apparatus comprising: a processing unit that adds advance notice of disconnection to a transmission frame and sends the transmission frame to the opposite apparatus during connection, the advance notice of disconnection being notice for notifying the disconnection in advance of sending the disconnection frame; and an encryption unit that encrypts the advance notice of disconnection, and sends the encrypted advance notice of disconnection to the opposite apparatus; wherein after sending the transmission frame having the advance notice of disconnection, the processing unit sends the disconnection frame to the opposite apparatus and the disconnection process is executed, the disconnection frame being a frame for the disconnection process, the opposite apparatus comprises a decoding unit that decodes the encrypted advance notice of disconnection and a processing unit that recognizes disconnection notice from the decoded advance notice of disconnection, the encrypted advance notice of disconnection being added to a transmission frame sent from the wireless communication apparatus before the disconnection process, and accepts a disconnection frame in stand-by time after sending the advance notice of disconnection, and after the stand-by time, the disconnection frame is ignored.