Patent ID: 6597278
Filing Date: 2003-07-22
Classification: G07C,G08G

Abstract:
A mobile communication device for communication with an immobile communication device which is fixed to have a communication service area, the mobile device comprising:communication control means for transmitting its own link identification code upon entering the communication service area of the immobile device, executing a link processing for communication with the immobile device, and executing a communication processing using the link identification code after a link with the immobile device is established; identification code check means for, prior to executing the link processing, receiving another link identification code which is already being used by the immobile device for communication with another mobile device in the communication service area, and checking a coincidence of the own link identification code with the another identification code; and identification code change means for changing the own link identification code in response to a check result indicating the coincidence of the link identification code.