In this paper we analyze three solutions for the micromobility problem. The SIP solution requires SIP domains; the SCTP solution requires "slightly" update of the protocol stack of the devices. The third solution is based on the fact that in a subnetwork the Access Router is always present. Consequently, in our opinion it is better to equip the Access Router with more "intelligence" in order to handle all mobility scenarios. In this work, we firstly compare these solutions against the problems of both single and simultaneous movements of the end peers. Then, we show the basic mechanisms of our enhanced access router, we called as smartAR. By numerical simulations, we argue that smartAR can be a candidate for optimal solution in term of hand-off delay cost and network complexity.