No abstract

Mobility Load Balancing (MLB) is a common technique to deal with the uneven traffic distribution in mobile networks. The aim of MLB is to alleviate congestion problems by sharing traffic demand among neighbor cells through the modification of handover parameters. MLB has been successfully used in legacy radio access technologies. However, in Long Term Evolution (LTE), MLB may lead to severe network performance degradation due to the tight frequency reuse used in this technology. In this paper, a comprehensive analysis of the limitations of MLB in LTE is done based on the results of a classical MLB algorithm in a live LTE network. Field trial results confirm that MLB reduces network congestion at the expense of degrading cell-edge user performance in the uplink of congested cells and the downlink of adjacent cells receiving traffic.Index Terms-LTE , Experimental and prototype results, Mobile network , Mobility Load Balance , Handover.

UpLink Power Control (ULPC) is a key radio resource management procedure in mobile networks. In this paper, an analytical model for estimating the impact of increasing the nominal power parameter in the ULPC algorithm for the Physical Uplink Shared CHannel (PUSCH) in Long Term Evolution (LTE) is presented. The aim of the model is to predict the effect of changing the nominal power parameter in a cell on the interference and Signal-to-Interference-plus-Noise Ratio (SINR) of that cell and its neighbors from network statistics. Model assessment is carried out by means of a field trial where the nominal power parameter is increased in some cells of a live LTE network. Results show that the proposed model achieves reasonable estimation accuracy, provided uplink traffic does not change significantly.