Mobility Robustness Optimization in Femtocell Networks Based on Ant Colony Algorithm

Haijun ZHANG  Hui LIU  Wenmin MA  Wei ZHENG  Xiangming WEN  Chunxiao JIANG  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.4   pp.1455-1458
Publication Date: 2012/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1455
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MRO,  handover,  ant colony algorithm,  femtocell,  

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Mobility Robustness Optimization (MRO) is one of the most important goals in LTE-Advanced Self-Organizing Networks (SON). Seamless handover in femtocell network is urgent and challenging, which has not been paid enough attention. Handover decision parameters, such as Time-To-Trigger (TTT), Hysteresis, Cell Individual Offset (CIO), have great effect on mobility performance, which may lead to Radio Link Failures (RLFs) and Unnecessary Handover. This letter proposes a handover parameters optimization approach based on Ant Colony Algorithm in the femtocell networks. The simulation result shows that the proposed scheme has a better performance than the fixed parameters method.