摘要
为解决由宏基站和微微基站构成的两层异构网络中存在的下行链路干扰问题,提出一种基于用户划分的资源分配算法,并根据资源分配策略进行功率控制。通过信干噪比的门限值,将用户分为正常用户和边缘用户,分配频带资源,在宏小区边缘用户所在的频带范围内,动态地调整干扰基站的发射功率,减小宏小区用户的跨层干扰。仿真结果表明,与现有方案相比,所提算法能够有效抑制干扰并提高系统的吞吐量。
To solve the problem of downlink inter-layer interference in two-layer heterogeneous networks consisting of macrocell and picocell,an algorithm for resource allocation based on users partitioning was proposed,and power was controlled based on it.According to the threshold of signal to interference plus noise ratio,users were divided into normal users and edge users,and different spectrum resources were allocated for different users.To achieve the purpose of reducing the inter-layer interference of the macrocell's users,transmit power was adjusted dynamically over the spectrum resource of macrocell's edge users.Simulation results indicate that the proposed algorithm can mitigate inter-layer interference effectively and boost system throughput compared with the existing methods.
出处
《计算机工程与设计》
北大核心
2017年第6期1446-1451,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(61272120)
西安市科技计划基金项目(CXY1117(5))
关键词
两层异构网络
跨层干扰
干扰协调
资源分配
功率控制
two-layer heterogeneous networks
inter-layer interference
interference coordination
resource allocation
power control
