Syed M. Raza, Dongsoo S. Kim, Dongryeol Shin, Hyunseung Choo
Journal of Communications and Networks, August 2015 (IF:0.747)
The existing PMIPv6 suffers from a long handover latency which in turn causes significant packet loss that is unacceptable for seamless realtime services such as multimedia streaming. This paper1 proposes an OpenFlow-enabled PMIPv6 (OF-PMIPv6) in which the control of access gateways is centralized at
an OpenFlow controller of a foreign network. The proposed OF-PMIPv6 separates the control path from the data path by performing the mobility control at the controller, whereas the data path remain direct between a mobile access gateway and the local mobility anchor in the form of IP tunnel. A group of simple OpenFlow-enabled access gateways performs link-layer control and monitoring activities for supporting the sophisticated mobility of mobile nodes and communicates with the controller through the standard OpenFlow protocol. The controller performs network-layer mobility signaling on behalf of the mobile access gateways and communicates with the local mobility anchor in the PMIPv6 domain. Benefiting from the centralized view and information of the proposed OF-PMIPv6 architecture, the authentication and configuration information are cached and reused at the controller of the foreign network to significantly reduce the handover latency. Analytical analysis of the proposed OF-PMIPv6 reactive and proactive handover schemes shows 38% and 66% decrease is the latency respectively. The initial results gathered from the OF-PMIPv6 testbed suggest the similar improvements.