异构网中基于层次-熵权法的高能效接入

为解决LTE-A两层异构网络下基于信号接受强度的传统用户接入方式造成宏基站和家庭基站负载不均衡的问题,提出基于层次-熵权法的用户接入基站的方案。为响应绿色通信,将能效作为强因素的前提下,结合信干噪比和时延综合考虑用户选择接入哪种基站,分别使用层次分析法和熵权法确定不同属性的主观权重和客观权重,将二者线性组合得到不同属性的最终权重。相较传统接入方式和基于层次-熵权法的接入方式下宏基站和家庭基站的负载情况和能效,仿真结果表明,层次-熵权法保证了宏基站和家庭基站之间负载均衡,提高了系统能效。

High energy efficiency access based on hierarchical-entropy weight method in heterogeneous systems

Under the LTE-A two-tier heterogeneous network,to solve the problem that the load of the macro base station and the home base station is unbalanced due to the traditional user access mode of the signal receiving strength,the scheme of user accessing base station based on hierarchical-entropy weight method was proposed.On the premise of taking energy efficiency as a strong factor in response to green communication and combining the signal-drying ratio and delay,which base station the user chose to access was determined.The subjective weight and objective weight of different attributes were determined using analytic hierarchy method and entropy method respectively,and the final weights of different attributes were obtained by linear combination of the two variables.The simulation results were compared with the load situations and the energy efficiencies of the macro base station and the home base station in the access mode based on traditional access method as well as the hierarchical analysis method,which show that the hierarchical-entropy weight method ensures the load balance between the macro base station and the home base station,and improves the energy efficiency of the system.