A METHOD OF THE SUBSCRIBER TERMINAL SELECTING THE PACKET DATA GATEWAY IN THE WIRELESS LOCAL NETWORK

摘要

The present invention provides a method for a Wireless Local Area Network (WLAN) User Equipment (UE) selecting a Packet Data Gateway (PDG). When the WLAN UE fails to access, the PDG will returns a message containing the cause value of failure to the WLAN UE that has sent the request such that the WLAN UE could perform different operations according to the specific cause value of failure in the message to select a PDG. For example, the WLAN UE may request DNS again to obtain the IP address of the PDG in the home network by parsing in connection with the requested service, or the WLAN UE may first subscribe to the service before re-performing the operation of selecting a PDG, or the WLAN UE may re-select a PDG with another parsed IP address and sends a connection request thereto. By means of this invention, the process of WLAN UE asking DNS to re-direct to the home network to select PDG is left out when possible, unnecessary signaling is avoided, and the network resources are saved.