US 11,757,832 B2
IP address allocation system and method
Wei Zhou, Shanghai (CN); and Zhongping Chen, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 18, 2020, as Appl. No. 17/126,805.
Application 17/126,805 is a continuation of application No. 16/798,200, filed on Feb. 21, 2020, granted, now 10,873,562.
Application 16/798,200 is a continuation of application No. 14/979,380, filed on Dec. 27, 2015, granted, now 10,574,626, issued on Feb. 25, 2020.
Application 14/979,380 is a continuation of application No. PCT/CN2013/078068, filed on Jun. 26, 2013.
Prior Publication US 2021/0250326 A1, Aug. 12, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 15/16 (2006.01); H04L 61/5014 (2022.01); H04L 61/59 (2022.01); H04L 45/00 (2022.01)
CPC H04L 61/5014 (2022.05) [H04L 61/59 (2022.05); H04L 45/54 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communications system in which a control plane is separated from a forwarding plane, wherein the communications system comprises:
a control device implementing a function of the control plane; and
a forwarder implementing a function of the forwarding plane, wherein the forwarder is configured to:
receive Dynamic Host Configuration Protocol (DHCP) information of a user equipment (UE);
send the DHCP information to the control device;
receive, from the control device, an Internet Protocol (IP) address allocated to the UE and first information, wherein the first information comprises a downlink flow table on which matching is performed using the IP address, and wherein the downlink flow table indicates that the forwarder sends a packet to the UE when a destination address of the packet is the IP address;
send the IP address to the UE;
receive a packet, wherein a destination address of the received packet is the IP address; and
send the received packet to the UE according to the downlink flow table;
wherein the control device is configured to:
receive the DHCP information from the forwarder;
allocate, in response to receiving the DHCP information, the IP address to the UE; and
send the IP address and the first information to the forwarder.