The present invention facilitates a handoff between cellular and wireless local area networks (WLANs). To facilitate a WLAN interface with the cellular network, a proxy packet control function (P-PCF) establishes a data tunnel to a packet data serving node (PDSN), as well as a WLAN association with a...http://www.google.de/patents/US20040008645?utm_source=gb-gplus-sharePatent US20040008645 - Efficient handoffs between cellular and wireless local area networks
