Virtualized EPC integrated with SDN

Contact: Dr. Jose Costa-Requena (jose.costa@aalto.fi)

Test bed virtualized EPC

© 2013 EIT ICT Labs 2

Virtualized EPC (vEPC):UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeBMME = Own implementationS/PGW = Open Source implementation

Nokia eNodeB

UE LTE dongle

Testbed virtualized EPC & SDN backhaul

© 2013 EIT ICT Labs 3

Virtualized EPC (vEPC):UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeBMME = Own implementationS/PGW = Open Source implementationSDN (backhaul) = Alix switches with OpenFlow 1.3)

CES switch

Nokia eNodeB

UE LTE dongle

Virtualized EPC migration across data centers

© 2013 EIT ICT Labs 4

CES switch

CES switch

Nokia eNodeB

UE LTE dongle

Nokia eNodeB

UE LTE dongle

Virtualized EPC (vEPC):UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeBMME = Own implementationS/PGW = Open Source implementationSDN (backhaul) = Alix switches OPF 1.3Migration over Openstack

VLAN mapping conecting data centers

VNF Live Migration

• Live migration = move a VM from a host to another while it runs• Example use cases• Clear a failing host• Empty a host for maintenance•Move instances to balance load

• OpenStack supports live migration via additional configuration•We studied the effects on migrating a VNFs with KVM

hypervisor within an OpenStack cloud deployment

MME Live Migration

•MME• Ping the active MME instance from a VM inside the

testbed with 1ms interval•Measure packet loss and delays during live migration

• Results• Packet loss range from 3 to 20 packets•With low packet loss, the response delay up to 150ms

S-/P-GW Live Migration

• The GW on the data transfer path•Measure the effects during an active file transfer•Metric: TCP throughput during live migration

• Downtime varies between 0.2 and 2 seconds•Worse case scenario• 2 second gap in all data transfer

Next steps

• Extend the testbed with new commercial eNodeB• Replace backhaul based on Alix switches into higher performance

switches• Performance testing with video streaming to overload the network• Test handover scenarios and migration with high load

THANKS!