EPC EPC SDN VIRTUALIZATION EPC SYSTEM AND SEAMLESS HANDOVER METHOD BETWEEN GATEWAYS BASED SDN IN THE SAME

摘要

The present invention relates to a virtualized EPC (Evolved Packet Core) system and a seamless handover method between SDN based gateways in this virtual EPC system. To this end, the present invention comprises a vEPC manager for assigning an IP address and a TEID of a terminal at a hypervisor level; Software-based open virtual switch (OpenVSwitch: OVS) that supports the open flow protocol at the hypervisor level; And a mobile core control module for constructing a routing rule table for controlling the OVS through an open flow protocol and forwarding a packet to the OVS in the destination direction with a VM that performs call processing between the terminal and the CN, ; At least one S / PGW CP in which a CP (Control Plane) of the SGW and a CP of the PGW are integrated; And one or more S / PGW DPs in which a DP (Data Plane) of the SGW and a DP of the PGW are integrated, wherein the VM is a VM that delivers a packet to a final destination, and upon receiving the connection request message from the terminal, PGW CP and the S / PGW DP from the vEPC manager in cooperation with the vEPC manager, and the S / PGW CP selected by the vEPC manager, in cooperation with the vEPC manager, receives the IP address and the IP address of the terminal from the vEPC manager, It is desirable to be assigned a TEID. Accordingly, the present invention can allocate the IP address and the TEID of the MS in the vEPC manager and control the routing using the OVS through the open flow protocol, thereby providing seamless handover between the gateways on the virtual EPC system.