中文摘要：

为了解决超密集异构网络中小基站数量较多引起的功率消耗较大问题,提出了一种高效的小基站休眠策略.该策略将系统中干扰较大的小基站分至相同的簇内,并对簇内小基站建立关于用户满意度以及功率消耗的最优化问题,通过二进制粒子群优化算法将部分小基站休眠.在资源分配方面,依据簇中包含的小基站数量对每个簇进行子信道的分配.在休眠策略优化过程中,通过对每个簇采取独立的休眠策略,提高了小基站的休眠以及激活效率.仿真结果表明,该休眠策略有效抑制了异构网络中存在的同层干扰,降低了系统的功率消耗.同时,在保证小基站用户满意度的情况下,该策略可以降低整个系统的中断概率.

英文摘要：

To solve the problem of the high power consumption caused by the large number of small base stations in hyperdense heterogeneous networks,an efficient sleep strategy for small base stations is proposed. In this strategy,the small base stations with large interference are grouped as a cluster.The optimization problem about the user satisfaction and the power consumption of each cluster is established. The binary particle swarm optimization algorithm is used to put some of the small base stations into a sleep mode. In terms of resource allocation,the sub-channels are allocated according to the number of the small base stations in the cluster. During the optimization of the sleep strategy,the sleep efficiency and the activation efficiency of the small base stations are improved by the independent sleep strategy of each cluster. The simulation results showthat this sleep strategy restrains the co-tier interference of the heterogeneous network and reduces the power consumption of the system. In addition,in the case of ensuring the satisfaction of the users,this strategy can reduce the outage probability of the whole system.