Dynamic ip address allocation system and method

专利名称：Dynamic ip address allocation system and

method

发明人：TRAN HUNG,JEAN-FRANCOIS

BERTRAND,HASAN SUHAIL,MIGUEL COBO

申请号：AU6451401申请日：20010608公开号：AU6451401A公开日：20011224

摘要：In a General Packet Radio Service (GPRS) network, a system and method ofdynamically allocating an Internet Protocol (IP) address to a mobile terminal (MT)operating in the network. A Gateway GPRS Service Node (GGSN) requests IP addressesover the Gi interface from a Radius server in an IP-based network. A Conditional PDPAddress (CPA) parameter is stored in the MT's Home Location Register (HLR) as part ofthe user subscriber data, and is passed to the GGSN during the GPRS Attach procedure.The CPA parameter indicates whether the subscriber is entitled to a backup IP address incase of failure to obtain one over the Gi interface, and whether the MT is a user of a real-time application. A timer in the GGSN sets a maximum time period (Ti) that the GGSN willwait for a response from the server, and a counter (Ni) sets the maximum number ofrequests that are sent. A Network Access Server (NAS) in the GGSN sends a request foran IP address from the GGSN to the server, and determines whether Ti expires withoutreceiving a response from the server. If no response is received, the GGSN allocates an IPaddress. A public IP address is allocated only if the MT is a user of a real-time application.Otherwise, a private IP address is allocated.

申请人：TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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