Our study shows that the fully load-adaptive LTE HetNet can significantly improve network's EE up to 10%, 40%, and 80% for high, medium, and low loads, respectively, as compared to the conventional non load-adaptive HetNet. The model also adapts and predicts the achievable data rate of each base station with respect to the traffic load. In this regard, a load adaptation factor is introduced to assess the network's EE performance. In this paper, a traffic load-adaptive model that aims to evaluate the EE of base stations in Long Term Evolution (LTE) HetNet is presented.First, a model that simulates the load-adaptive power consumption behaviour of LTE HetNet is developed. Optimising such a dynamic operation in a heterogeneous network (HetNet) remains an active topic of research. One of the main approaches for improving the network energy efficiency (EE) is through the introduction of load adaptive techniques, where the network's components/subsystems are switched off when the network is lightly loaded.
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