In the last few years, femtocells have gained a great deal of interest as an emerging wireless and mobile access technology to improve indoor coverage and network capacity. In such an environment, mobility management is one of the major concerns that may limit the wide deployment and adoption of such networks. In this paper, we investigate the handover procedure for the two-tier macro/femto LTE networks. An optimized handover algorithm with an efficient call admission control has been proposed and described. Our proposed scheme is mainly designed to reduce the number of unnecessary handovers and to maintain the communication quality during the handover. The choice of the femtocell target takes into account the direction of the mobile user, its velocity and the quality of the signal. Performance evaluation results show that our algorithm minimizes both the number of hand-in and the handover drop rate. Besides, the signal quality in terms of SINR after the hand-in is maintained higher than a fixed threshold, which maximizes the sojourn time of the mobile user within the selected femtocell.
Wimob IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 2013 https://hal.archives-ouvertes.fr/hal-01076578 IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 2013, Oct 2013, Lyon, France. 2013, <10.1109/WiMOB.2013.6673420>ARRAY(0x7fe6a6f44000) 2013-10-07