Abstract—Load imbalance among multi-cell has tremendous impact on the network performance. The previous researches on load balancing place focus on maximizing the load balancing index of the network and cannot always guarantee the best performance of network’s key performance indicators (KPIs). In this paper, taking both the network resource limitation and users’ data rate demand into account, we aim to simultaneously optimize both the load balancing index and network average load for quality-of-service (QoS) requirements services, while maximizing the network utility for other services. Moreover, we proposed a practical algorithm with low complexity. Comparing with the previous methods, simulation results show that the proposed method can achieve better network performances, such as lower new call blocking rate and higher network resource utilization

Index Terms—LTE, multi-cell, load balancing (LB), quality-of-service (QoS), multi-objective optimization problem