Target cell selection scheme using LMS algorithm for load estimation of neighboring ENBS in 3GPP LTE system

초록

Handover failure probability is one of the important factors to determine the handover performance in cellular radio system such as the 3rd generation partnership project (3GPP) long term evolution (LTE). To minimize the handover failure probability, the Hybird target cell selection (TCS) scheme considering both the received signal strength (RSS) and load information of neighboring evolved Node Bs (eNBs) based on X2 interface in 3GPP LTE system has been introduced. However, the amount of cell load in serving and neighboring eNBs can be drastically changed over time due to the handover operation, so the Hybrid TCS scheme should consider the cell load change between the serving and neighboring eNBs in the handover procedure for handover preparation. This paper proposes a modified Hybrid TCS scheme based on the least mean square (LMS) algorithm for estimating the load status of the neighboring eNBs in order to mitigate the handover failure probability. The proposed TCS scheme chooses the target eNB with minimum load based on the LMS algorithm and providing higher RSS. Experiment results reveal the effectiveness of the proposed scheme and its advantages over the conventional schemes in terms of handover failure probability. © 2013 ICIC International.

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