4 METHOD AND SYSTEM FOR HANDLING A DYNAMIC HOST CONFIGURATION PROTOCOL INTERNET PROTOCOL VERSION 4 ADDRESS RELEASE

摘要

An Internet Protocol (IP) address release method of a packet data network gateway (PGW) in a mobile communication system of the present invention includes providing a user equipment (UE) with IP version 4 (IPv4 ) Address and an IP version 6 (IPv6) address of the IPv4 address from the serving gateway (SGW), receiving a control message associated with the release of the IPv4 address from the serving gateway (SGW) The method comprising the steps of: transmitting a binding-withdrawal message including information instructing to hold the IPv4 address; and receiving a binding-withdrawal confirmation message corresponding to the release of the IPv4 address from the SGW.