CPC H04L 61/5014 (2022.05) [H04L 61/59 (2022.05); H04L 45/54 (2013.01)] | 20 Claims |
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.
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