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通信技术突飞猛进的发展,带来了数据业务量的爆炸式增长,与之相对应,也使得网络能耗的增加成为无线通信可持续发展必须考虑的关键问题。分层异构网络改变了传统蜂窝网络的拓扑结构,通过卸载宏基站用户到低功率小基站中,可在提高网络容量的基础上降低网络能耗。但分层异构网络中存在的严重层间干扰问题会带来网络能效的明显恶化。本文提出分层异构网络增强型干扰协调中几乎空白子帧比率优化算法改善网络能效,仿真结果表明,所提算法可有效改善系统能效。
The rapid development of communication technology has led to the explosive growth of data traffic. Correspondingly, the increase of network energy consumption has also become a key issue that must be considered in the sustainable development of wireless communications. Hierarchical heterogeneous networks have changed the topology of traditional cellular networks. By offloading macro base station users to low-power small base stations, network energy consumption can be reduced on the basis of improving network capacity. However, the serious inter-layer interference problem in Hierarchical Heterogeneous Networks leads to obvious deterioration of network energy efficiency. This paper proposes an almost blank sub-frame ratio optimization algorithm for enhanced interference coordination in Hierarchical Heterogeneous Networks to improve the network energy efficiency. The simulation results show that the proposed algorithm can effectively improve the system energy efficiency.