1. Virtualized EPC integrated with SDN Contact: Dr
Virtualized EPC integrated with SDN Contact: Dr. Jose Costa-Requena

2. Test bed virtualized EPC
Virtualized EPC (vEPC):
UE = Samsung LTE dongles
eNodeB = Nokia commercial eNodeB
MME = Own implementation
S/PGW = Open Source implementation
Nokia eNodeB
UE LTE dongle
© 2013 EIT ICT Labs

3. Testbed virtualized EPC & SDN backhaul
Virtualized EPC (vEPC):
UE = Samsung LTE dongles
eNodeB = Nokia commercial eNodeB
MME = Own implementation
S/PGW = Open Source implementation
SDN (backhaul) = Alix switches with OpenFlow 1.3)
CES switch
Nokia eNodeB
UE LTE dongle
© 2013 EIT ICT Labs

4. Virtualized EPC migration across data centers
Virtualized EPC (vEPC):
UE = Samsung LTE dongles
eNodeB = Nokia commercial eNodeB
MME = Own implementation
S/PGW = Open Source implementation
SDN (backhaul) = Alix switches OPF 1.3
Migration over Openstack
CES switch
Nokia eNodeB
UE LTE dongle
© 2013 EIT ICT Labs

5. VLAN mapping conecting data centers

6. 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

7. 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

8. 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

9. 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

10. THANKS!