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The exponential growth of the number of multihomed mobile devices is changingthe way how we can connect to the Internet. Our mobile devices are demandingfor more network resources, in terms of traffic volume and QoS requirements.Unfortunately, it is very hard to a multihomed device to be simultaneouslyconnected to the network through multiple links. The current work enhances thenetwork access of multihomed devices agnostically to the deployed accesstechnologies. This enhancement is achieved by using simultaneously all of themobile devices interfaces, and by routing each individual data flow through themost convenient access technology. The proposed solution is only deployed atthe network side and it extends Proxy Mobile IPv6 with flow mobility in acompletely transparent way to mobile nodes. In fact, it gives particularattention to the handover mechanisms, by improving the detection and attachmentof nodes in the network, with the inclusion of the IEEE 802.21 standard in thesolution. This provides the necessary implementation and integration details toextend a network topology with femtocell devices. Each femtocell is equippedwith various network interfaces supporting a diverse set of accesstechnologies. There is also a decision entity that manages individually eachdata flow according to its QoS / QoE requisites. The proposed solution has beendeveloped and extensively tested with a real prototype. Evaluation resultsevidence that the overhead for using the solution is negligible as compared tothe offered advantages such as: the support of flow mobility, the fulfil ofVoIP functional requisites, the session continuity in spite of flows mobility,its low overhead, its high scalability, and the complete transparency of theproposed solution to the user terminals.

PMIPv6 Integrated with MIH for Flow Mobility Management: a Real Testbed with Simultaneous Multi-Access in Heterogeneous Mobile Networks