Patent ID: 7224699

Claim:
A Wireless Local Area Network Access Gateway (WAG), comprising: a routing enforcement module for enforcing transmission routes of data packets received by the WAG; a message filtering module for obtaining and storing packet filtering rules for filtering the data packets, and for filtering both data packets sent to a Wireless Local Network (WLAN) and data packets received from the WLAN according to the packet filtering rules; and a charging module for collecting charging information for data packets passing through the WAG, wherein: the message filtering module connects to the routing enforcement module and the charging module, filters the data packets received by the WAG, drops the data packets matching at least one of the stored packet filtering rules and outputs the data packets matching none of the stored packet filtering rules; after the charging module collects the charging information for the data packets passing through the WAG, the data packets are outputted to a service authentication and authorization unit of the WLAN, or a Packet Data Gateway (PDG), or WLAN user equipment (UE).