Method and system for handling a dynamic host configuration protocol internet protocol version 4 address release
A method and system for releasing an Internet Protocol (IP) version 4 address using a Dynamic Host Configuration Protocol (DHCP) release in a Proxy Mobile IP version 6 (PMIPv6) of a third Generation Partnership Project (3GPP) Evolved Packet Core (EPC). The method includes transmitting a DHCP release request from a Serving GateWay (SGW) to a Packet Data Network (PDN) GW, transmitting a binding revocation from the PDN GW to the SGW, acknowledging the binding revocation from the SGW to the PDN GW, and deleting the IP version 4 connection for an active PDN connection.
1. A method for releasing an Internet Protocol (IP) address using a Dynamic Host Configuration Protocol (DHCP) release in a third Generation Partnership Project (3GPP) Evolved Packet Core (EPC), the method comprising:
allocating an IP address to a User Equipment (UE) to activate a Packet Data Network (PDN) connection between the UE and a Serving Gateway (SGW);
activating the PDN connection between the SGW and Packet Data Network GateWay (PDN GW);
transmitting a DHCP release request from the SGW to the PDN GW;
transmitting a binding revocation from the PDN GW to the SGW;
acknowledging a binding revocation from the serving gateway to the packet data network gateway; and
deleting an IPv4 connection for an active PDN connection while keeping the PDN connection active.
2. The method of claim 1 , further comprising:
initiating a PDN disconnection procedure by the PDN GW in order to delete the PDN connection.
3. The method of claim 1 wherein, transmitting the binding revocation comprises:
allocating a dummy IP address.
4. The method of claim 1 , wherein transmitting the binding revocation comprises:
providing an indication specific to the IPv4 to be deleted.
5. The method of claim 1 , wherein deleting the Ipv4 connection, comprises:
removing an actual IP address; and
updating a dummy IP address from the PDN GW to the SGW.