Patent ID: 7620808
Filing Date: 2009-11-17
Classification: H04L

Abstract:
1. A method, comprising: entering state information associated with a packet data protocol connection in a record maintained in a firewall, the packet data protocol connection being established between a user equipment and a node via a gateway node, and the firewall being configured to control transportation of packet data protocol data based on the record, and the gateway node being configured to, when deactivation of the packet data protocol connection for the user equipment is detected, send information to the firewall that the user equipment cannot be reached; receiving in the firewall the information that the user equipment cannot be reached; in response to receiving said information, deleting the state information from the record; and dropping any remaining packet data protocol data associated with said address comprising freezing use of an address associated with the packet data protocol connection from use by other data transportation connections for a predetermined period of time after detecting that the packet data protocol connection is deactivated.