We deal with a cost-based adaptive handover hysteresis scheme for the horizontal handover decision strategies, as one of the selfoptimization techniques that can minimize the handover failure rate (HFR) in the 3rd generation partnership project (3GPP) longterm evolution (LTE) system based on the network-controlled hard handover. Especially, for real-time operation, we propose an adaptive hysteresis scheme with a simplified cost function considering some dominant factors closely related to HFR performance such as the load difference between the target and serving cells, the velocity of user equipment (UE), and the service type. With the proposed scheme, a proper hysteresis value based on the dominant factors is easily obtained, so that the handover parameter optimization for minimizing the HFR can be effectively achieved. Simulation results show that the proposed scheme can support better HFR performance than the conventional schemes.
Lee et al. REF propose a cost-based adaptive handover hysteresis scheme that focuses on a performance improvement in terms of the handover failure ratio in real time.
A cost-based adaptive handover hysteresis scheme to minimize the handover failure rate in 3GPP LTE system
EURASIP Journal on Wireless Communications and Networking
Computer Science