Patent ID: 8023499

Claim:
A communication network control system for switching a communications session from a first communication terminal engaged in performing the communications session with a communicating-apparatus communication terminal to a second communication terminal not presently communicating with the communicating-apparatus communication terminal so that the communications session can be continued using the second communication terminal in place of the first communication terminal, comprising: a mobility management section configured to set a physical and logical transmission path between communication terminals, and to place a call to the second communication terminal to set a call connection with the second terminal and the communicating-apparatus communication terminal; and a service management section configured to manage the communications session in which data communications are established between applications of connected communication terminals on the transmission path while controlling a start, suspension, and resuming of the communications session between the communication terminals, wherein the service management section is further configured: to receive a switching request signal from the first communication terminal requesting switching the communications session from the first communication terminal to the second communication terminal, and for then instructing the mobility management section to initiate setting the call connection between the second communication terminal and the communicating-apparatus communication terminal, to notify the second communication terminal of communications session state information of the communications session as executed between the communicating-apparatus communication terminal and the first communication terminal, and to reestablish the communications session between the second communication terminal and the communicating-apparatus communication terminal after transmitting a communications session establishment request to the second communication terminal.