IP address allocation system and method

An address allocation method, the method comprising:

• receiving, by a forwarder, from an external network element, a dynamic host configuration protocol (DHCP) request of a user equipment (UE);
• sending, by the forwarder, the DHCP request and a first tunnel endpoint identifier (TEID) assigned for the UE to a control device of a core system architecture evolution network;
• sending, by the control device, a DHCP response, including an internet protocol (IP) address allocated to the UE, to the forwarder;
• receiving, by the forwarder, from the control device first instruction information, wherein the first instruction information comprises a downlink flow table on which matching is performed using the IP address allocated to the UE, wherein the first instruction information instructs the forwarder to send a packet to the UE according to a second TEID assigned for the UE when the packet's destination address is the IP address, and wherein the first TEID and the second TEID is user characteristic information of the UE;
• and
• sending, by the forwarder, based on the first instruction information, the DHCP response to the UE.

A non-transitory computer-readable medium storing computer instructions for execution by one or more processors, wherein the computer instructions configure the one or more processors to:

• receive from an external network element a dynamic host configuration protocol (DHCP) request of a user equipment (UE);
• send the DHCP request and a first tunnel endpoint identifier (TEID) assigned for the UE to a control device;
• receive from the control device a DHCP response including an internet protocol (IP) address allocated to the UE;
• receive from the control device first instruction information, wherein the first instruction information comprises a downlink flow table on which matching is performed using the IP address allocated to the UE, wherein the first instruction information instructs a forwarder to send a packet to the UE according to a second TEID assigned for the UE when the packet's destination address is the IP address, and wherein the first TED and the second TEID is user characteristic information of the UE;
• and
• send, based on the first instruction information, the DHCP response to the UE.