Mobility Management for Vehicular User Equipment in LTE/Mobile Femtocell Networks

Related Work

In an LTE system, the mobility management procedures such as HO and cell reselection are becoming more complex due to the dense deployment of different type of cells. Many studies have examined the mobility robustness and HO issues in heterogeneous networks. Researchers have focused on different topics such as signal strength during HO, interference, SINR, cells’ properties, UEs positioning, outage probability, drop and block calls probabilities.

Guohua (2013) proposed mobility robustness optimisation scheme based on exploiting measurement reports such as link quality, SINR, UE’s position and direction. The aim of the study was to find the best target cell by updating the HO trigger mechanism after considering the SINR parameter. While in Peng (2012), they proposed two schemes to improve the HO performance during the process of Pico-cells leaving and attaching. The idea is to perform the HO from a small to a large cell and vice versa. It is worth noting that the above was based on fixed BSs where the UEs were vehicular. As result, an increased number of unnecessary HOs which will lead to an increased number of dropped calls.