TCP performance evaluation over multihomed networks

Current Internet nodes can be considered as multihomed end-hosts as they are equipped with several wireless interfaces, each one related with a distinct access technology. The Transport Control Protocol (TCP) is considered as the cornerstone of Internet. However, current TCP implementations do not take into account the multihoming aspect of the current Internet nodes. In this paper we target to quantify the impact of the multhoming nature of the end-hosts on TCP. For this purpose, we design a novel multi-interfaced mobile node in the OMNeT++ network simulator. Our model relies on Layer 2 virtualization approach in order to implement an abstraction of the available wireless interfaces towards the upper-layers protocols. Obtained results shows that Layer 2 virtualization mitigate some of the TCP misbehavior on a multihomed environment.