In an IP-based cellular telecommunications network, such as for example in a Code Division Multiple Access (CDMA) 2000 cellular telecommunications network, a method, a system and a Packet Data Serving Node (PDSN) for registering a Mobile Node (MN) with the PDSN. Once a Point-to-Point Protocol (PPP) connection...http://www.google.de/patents/US6904033?utm_source=gb-gplus-sharePatent US6904033 - Method, system and packet data serving node (PDSN) for mobile IP (MIP) registration of a mobile node (MN)