Tuning of handover parameters in LTE-A heterogeneous networks

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Bilgisayar Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2014

Öğrenci: EMRAH TUNÇEL

Danışman: CEVAT ŞENER

Özet:

In this work, a new handover parameter optimization algorithm for the LTE-A networks is presented. Most of the previous solutions that are proposed to solve the handover parameter optimization problem, optimize the handover parameters with considering all of the neighbor cells together. But with the introduction of heterogeneous networks to the LTE-A standards, the deployments are no longer homogeneous and the cell borders have different inter-cell interference conditions that changes according to the different cell types. To overcome this, the new algorithm optimizes the handover parameters for each of the neighbor cell separately. Since the hysteresis and time to trigger parameters cannot differentiate per neighbor cell, along with them, cell individual offset (CIO) values are tuned for providing different handover margins per neighbor cell. The proposed algorithm is tested on a simulation environment along with some of the important previous works. According to the results, the proposed algorithm performs better than the other algorithms while decreasing the handover failures.