Method of redirecting packet data gateway in wireless local area network

摘要

The present invention provides a method of redirecting packet data gateway (PDG) in wireless local area network. Using the present invention, when user terminal fails to access the PDG, the PDG which has received the application of user terminal return failure message including IP address of PDG which can provide service for application user to user terminal. After receiving the message , the user terminal performs redirection using the IP address which the message provided, requests establishing tunnel link to new PDG Thus , user terminal can directly redirect to PDG which can provide service, avoiding the process that user terminal accesses DNS and redirects to home network to select PDG At the same time , user terminal can definitely know which PDG can provide service with present invention, therefore reducing the number of connecting failure , and optimizing the utilization of network source.