A wireless communication system is disclosed. More particularly, access network selection scheme in visited network in a wireless communication system are disclosed. A method for selecting a Wireless Local Area Network (WLAN) access network by a user equipment (UE) in a visited network may comprise: determining, by the UE, if a selected WLAN access network in the visited network is available; updating, by the UE, a WLAN selection policy with a list of excluded WLAN access network, if the selected WLAN access network in the visited network is not available; and re-determining, by the UE, if there is an available WLAN access network in the visited network based on the updated WLAN selection policy.