In a General Packet Radio Service (GPRS) network, a system and method of dynamically allocating an Internet Protocol (IP) address to a mobile terminal (MT) operating in the network. A Gateway GPRS Service Node (GGSN) requests IP addresses over the Gi interface from a Radius server in an IP-based network....http://www.google.com.tw/patents/US6687252?utm_source=gb-gplus-share專利 US6687252 - Dynamic IP address allocation system and method
