基于频谱感知技术的家庭基站干扰避让方案

Adaptive Interference Avoidance Schemes for Femtocell Based on Spectrum Sending

家庭基站的干扰问题逐渐成为家庭基站发展应用的瓶颈之一。分析了家庭基站的干扰环境和条件,提出了两种新型的干扰避让方案。两种方案都利用频谱感知技术作为干扰避让的核心,但由于家庭基站干扰的复杂性,在家庭基站独立工作或与宏蜂窝进行频谱资源分配信息交互的条件下,两种方案分别采用了不同的机制。仿真显示,家庭基站独立工作条件下所提方案虽然降低了部分宏蜂窝用户的服务水平,但提供了更高的家庭基站容量;而利用与宏蜂窝的信息交互可更有效地避免干扰。综合来看,所提的两种方案较功率控制具有明显的优势。

The interference between femtocell and macrocell is one of the bottlenecks which affect the development and application of femtocell.This paper analyzes the interference environment for femtocell,and proposes two novel interference avoidance schemes.Both schemes use spectrum sensing technology as the core of interference avoidance.Due to the complexity of interference between femtocell and macrocell,two schemes are adopted different mechanisms,which are under the conditions of working independently or information interaction with the macrocell.The simulation shows,the proposed scheme,which the femtocell works independently,provides higher femtocell capacity with the slightly capacity decreasing of macrocell users,and the scheme utilizes information interaction with macrocell could avoid the interference more effectively.Overall,the two proposed schemes in this article have obvious advantages compared to the power control scheme which is the most commonly used.