Certain embodiments may have measures that include establishing a connection between a network and a neighboring network for transiting a transmission session, obtaining connection state parameters based on at least one of the connection, the network, and the neighboring network, and generating a charging information message based on the connection state parameters at a network interface side, and receiving a charging information message related to a connection between a network and a neighboring network for transiting a transmission session, storing connection state parameters based on the charging information message, and generating an account for the transmission session based on the connection state parameters at a charging evaluation side.
