Mobility Robustness Optimization in Self-Organizing LTE Femtocell Networks

Femtocell is a promising solution for enhancing the indoor coverage and capacity in wireless networks. However, for the small size of femtocell and potentially frequent power on/off, existing handover schemes may not be reliable enough for femtocell networks. Moreover, improper handover parameters settings may lead to handover failures and unnecessary hand overs, which make it necessary to enhance the mobility robustness for femtocells. In this paper, the authors propose a gradient method and cost function-based mobility robustness optimization scheme for Long Term Evolution (LTE) femtocell self-organizing networks.