一种基于图论的三维场景下家庭基站间干扰协调方案
首发时间:2012-03-06
摘要:随着家庭基站的飞速发展,家挺基站密集部署在建筑物中将会成为一个重要的场景。然而这个趋势将带来严重的家庭基站间干扰,本文的三维场景仿真也证明了这一点。若这一干扰没有被很好的控制,将严重影响室内用户的服务质量,尤其是家庭基站小区边缘的用户。为了解决这一问题,本文在家庭基站三维部署场景下建立了家挺基站用户下行接收干扰模型。提出了一种基于图论的协调建筑内家庭基站间干扰的资源分配方案。最后,仿真结果证明所以方案有效提升了家庭基站平均吞吐量,同时保证了家庭挺基站边缘用户的下行信道解调可靠性。
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A Clustering Scheme to Coordinate Inter-femtocell Interference in 3D In-building Scenario
Abstract:With rapid development of femtocell, femtocells densely deployed in buildings will become an important scenario. However, this trend results in severe inter-femtocell interference in the same building, which is revealed by our simulations in the 3-Dimention (3D) scenario. If this type of interference is not well controlled, services to indoor users are bound to be deteriorated, especially for the femtocell edge users. Motivated by this problem, Femto users' received interference model is constructed based on the scenario of 3-dimention femtocell deployment. Then, a graph theory based in-building inter-femtocell coordination scheme is proposed and includes three phases: 1) interference graph is established; 2) femtocell clustering is designed; 3) the concept of cluster influence circle is proposed and utilized to allocate frequency resources to femtocells. Finally, the simulation results confirm that the proposed scheme improves the femtocell average throughput by 22.4% and 26.2% in comparison with frequency universal reuse scheme and frequency hopping scheme respectively, and ensures the channel demodulation reliability of cell edge Femto users.
Keywords: femtocell interference management resource management graph
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