Inter-domain Mobility Management Using SDN for Residential/Enterprise Real Time Services

The tremendous evolution in IoT real time services that requires continuous connectivity to enterprise, residential, and private cloud services stimulates operators and enterprises to rethink of their current adopted mobility solutions for wider service accessibility. Proxy Mobile IPv6 (PMIPv6) is widely adopted in 4G Long Term Evolution (LTE) and WiFi Hotspots for its wide area coverage while Control And Provisioning of Wireless Access Points (CAPWAP) protocol is preferred in enterprise's Wireless LAN Controller (WLCs) for its unified access for both wired and wireless networks. Both protocols struggle when offering mobility solutions between enterprises with different administration to ensure optimized WAN usage with minimum latency and guaranteed QoS while satisfying the unified access, and the privacy compliance requirements. LTE provides a partial solution for inter-domain mobility crossing enterprises which is even hard for WiFi service provider to offer. This paper proposes am inter-domain mobility framework based on Software defined Network (SDN) that overcomes previous protocols' challenges. The proposed framework is LTE independent thus it can be adopted cross enterprises or smart cities or through WiFi or LTE service provider. The Enterprise wired network can be a full migrated SDN network or a standard switched network. The framework uses SDN mobility overlay to transparently detect mobile node's (MN) registration and make selective break out based on the MN's subscription profiles while providing simultaneous access to the registered services as home, intranet, and internet. The framework is an initiative toward smooth migration of existing infrastructures to the next generation SDN service platform where mobility is provided as a service. A prototype is created to support the proposed framework. The experimental results show that MNs are successfully identified and their mobility profiles are activated in almost 1.3~3 seconds while standard MN's packets are wire speed forwarded with almost zero latency.