International Workshop on SON

Research Article

Automated Handover Optimization Mechanism for LTE Femtocells

  • @INPROCEEDINGS{10.1109/ChinaCom.2012.6417554,
        author={Yongliang Wang and Wenjing Li and Peng Yu and Xuesong Qiu},
        title={Automated Handover Optimization Mechanism for LTE Femtocells},
        proceedings={International Workshop on SON},
        keywords={femtocell handover hysteresis margin self-optimization},
  • Yongliang Wang
    Wenjing Li
    Peng Yu
    Xuesong Qiu
    Year: 2012
    Automated Handover Optimization Mechanism for LTE Femtocells
    DOI: 10.1109/ChinaCom.2012.6417554
Yongliang Wang1,*, Wenjing Li1, Peng Yu1, Xuesong Qiu1
  • 1: Beijing University of Posts and Telecommunications
*Contact email:


Abstract—The introduction of femtocells results in more frequent initiation of handover procedure, which leads to a huge amount of signaling overhead in the network. For indoor deployed femtocells, most of the frequent handovers are initiated in some special areas where the subscribers’ mobility characteristic is special, such as frequently step in and out of the femtcell coverage at a balcony. While in general areas, the mobility of subscribers seldom results in frequent handovers. In this paper, an automated handover optimization mechanism is proposed for femtocells in LTE. The proposed mechanism could differentiate the special areas and general areas by dint of an ACO (ant colony optimization) algorithm, and then configures different HM (hysteresis margin) for different areas in the same femtocell coverage. Simulation results indicate that significant reduction of the handover number is achieved and have no negative impact on the network performance.