Patent ID: 8050667

Claim:
A virtual terminal server connectable to a mobile communication terminal through a communication network, the virtual terminal server comprising: an identification information acquiring unit for acquiring identification information on at least one of the mobile communication terminal and a user of the mobile communication terminal from the mobile communication terminal; an activation request acquiring unit for acquiring activation information on an activation request of an application including a communication function from the mobile communication terminal; a communication control unit for performing a communication connection control on behalf of the mobile communication terminal to realize the application including the communication function corresponding to the activation information acquired by the activation request acquiring unit; an application control unit for creating and managing a status of a state transition that indicates to which screen a transition is currently being made for the mobile communication terminal connected to the virtual terminal server, and for checking whether the application is already activated by checking the status of the mobile communication terminal; and a screen constituting unit for, after the application control unit checks that the application is not activated yet, acquiring or generating screen information to be displayed on the mobile communication terminal by executing the application including the communication function, processing the acquired or generated screen information to be suitable for a screen performance of the mobile communication terminal based on the identification information acquired by the identification information acquiring unit, and outputting the screen information to the mobile communication terminal.