Patent ID: 8612567

Claim:
A policy providing apparatus comprising: a device control unit configured to recognize service status information of a data service which is used by a terminal device through one network among two or more networks, generate a network change policy for changing the one network accessed by the terminal device based on the service status information, and provide the terminal device with the network change policy; a terminal device, comprising: a multi communication unit configured to support two or more networks and an access control unit configured to when the network change policy is received, determine whether it is possible to access a particular network required to be accessed based on the network change policy, and when it is determined to be possible to access the particular network, access the particular network through the multi communication unit and change a thereby current access network of the terminal device to the particular network; and wherein the terminal device further comprises a testing unit configured to transmit or receive a test packet through the two or more networks for detecting performance information of each of the two or more networks.