Patent ID: 7706793

Claim:
An optimized interaction method of a Wireless Local Area Network (WLAN) WLAN user terminal selecting an access mobile communication network, comprising the steps of: a. after a wireless connection between the WLAN user terminal and a WLAN access network is established, the WLAN access network or the WLAN user terminal initiating an access authentication procedure, and the WLAN access network sending a user identity request message to the WLAN user terminal; b. after receiving the user identity request message, the WLAN user terminal determining network selection information to be currently carried according to a detecting result of whether the WLAN access network is changed or according to user selection information, and returning a message containing the determined network selection information to the WLAN access network; and c. the WLAN access network judging whether the network selection information in the received message indicates one of the mobile communication operation networks to which the WLAN access network is currently connected; if so, the WLAN access network sending an access authentication request from the WLAN user terminal to a mobile communication operation network indicated in the network selection information, otherwise, the WLAN access network sending a notification signaling to the WLAN user terminal, the WLAN user terminal completing subsequent operations according to contents in the notification signaling.