中文摘要：

现有的基站休眠节能策略面临如何在提高能效的同时保证业务QoS的问题，提出了一种在密集场景下微基站与宏基站协作的微基站休眠策略，以提高系统能效。首先，微基站在业务请求较低时进入休眠状态以达到节能的目的；其次，利用宏基站覆盖范围广的特点，将其作为协作基站，当微基站休眠时它能够辅助处理一些业务；最后，将业务按照容量大小分类，发挥出宏基站与微基站的各自特点，有区别地选择基站处理业务。仿真结果表明，该方案比现有的基站休眠节能方案具有优势。

英文摘要：

The existing BS（base station） sleep policy faced with the problem that how to improve energy efficiency while ensuring business QoS. This paper presents a method that Micro-BS and macro-BS cooperate to improve the energy efficiency of the system in intensive scene. First, the micro-BS with low service requirements enter the sleep state, in order to save the energy. Second, due to the wide coverage of the macro-BS, it can be considered as collaborative BS to assist the dormant micro-BS in dealing with some service. Finally, the different types of services are classified into multiple groups, so that macro-BS and micro-BS can separately process these services based on their features. The simulation results show that the proposed scheme has advantages over the existing BS sleep energy saving scheme.