基于干扰图的家庭基站分簇频谱分配算法
Clustering spectrum allocation algorithm based on interference graph in femtocell networks
史菊蓉 1朱琦1
作者信息
- 1. 南京邮电大学江苏省无线通信重点实验室,江苏南京210003;南京邮电大学教育部宽带无线通信与传感网技术重点实验室,江苏南京210003
- 折叠
摘要
为了减小宏用户和家庭基站之间的干扰,有效分配频谱,本文提出了基于图论着色的分簇信道分配算法.该算法在保证满足宏用户信干噪比(signal-to-interference plus noise ratio,SINR)要求的前提下确定每个家庭基站可用的子信道集,再根据构造的家庭基站系统干扰图,动态地给每个用户分配所有可用的频谱资源.本文分别构建无向干扰图和有向权重干扰图,使用了一种基于簇的改进算法,在保证宏用户信干噪比的条件下,尽量提高家庭基站的吞吐量.仿真结果表明,本文算法可以降低宏用户和家庭基站的中断率,同时频谱效率得到提高.
Abstract
In order to mitigate the interference between macrocell users and femtocells and allocate the spectrum efficiently,a graph coloring based clustering algorithm for channel allocation is proposed in this paper.The algorithm guarantees the signal-to-interference plus noise ratio (SINR) requirements of macrocell users.First,the set of subchannels which can be used for each femtocell is determined.Then according to the constructed interference graph of the femtocell networks,each user is allocated all the available spectrum resources dynamically.In this paper,the undirected graph and directed weighted interference graph are constructed respectively and an improved cluster based algorithm is used to ensure the SINR of macrocell users and maximize the femtocell throughput.Simulation results show that the proposed algorithm can reduce the outage of macrocell users and femtocells as well as improve the spectral efficiency.
关键词
正交频分复用(OFDM)/宏小区/家庭基站/图论/干扰管理Key words
Orthogonal Frequency Division Multiplexing (OFDM)/macrocell/femtocell/graph theory/interference management引用本文复制引用
基金项目
国家自然科学基金(61171094)
国家自然科学基金(61071092)
国家科技重大专项基金(2011ZX03001-006-02)
国家科技重大专项基金(2011ZX03005-004-03)
江苏省自然科学基金重点研究专项(BK2011027)
出版年
2013
NETL
NSTL
维普
万方数据