Multi-Channel Hybrid Access Femtocells: A Stochastic Geometric Analysis

Multi-Channel Hybrid Access Femtocells: A Stochastic Geometric Analysis
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多通道混合接入 Femtocell:随机几何分析

DOI:
10.1109/tcomm.2013.050813.110508
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发表时间:
2011-08
影响因子:
8.3
通讯作者:
Zhang, Wenyi
Zhang, Wenyi
中科院分区:
计算机科学2区
文献类型:
--
作者:
Zhong, Yi;Zhang, Wenyi

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对于由宏蜂窝和毫微微蜂窝组成的双层网络,信道接入机制可以被配置为开放接入、封闭接入或混合接入。混合接入是开放接入和封闭接入机制之间的一种折衷,其中一部分可用频谱资源被非用户共享,而其余频谱资源则保留给用户。本文重点研究了一种采用正交频谱接入方案的多信道毫微微蜂窝基站的混合接入机制。考虑随机信道分配策略,我们分析了在下行链路的性能。使用随机几何作为技术工具,我们的分布模型的毫微微蜂窝的泊松点过程或奈曼-斯科特集群过程,并推导出分布的信号干扰加噪声比,和平均可实现的速率,非用户和用户。所建立的表达式是服从数值评估,并脱落的关键见解订户和nonsubscribers之间的性能权衡。数值模拟证实了分析结果。
For two-tier networks consisting of macrocells and femtocells, the channel access mechanism can be configured to be open access, closed access, or hybrid access. Hybrid access arises as a compromise between open and closed access mechanisms, in which a fraction of available spectrum resource is shared to nonsubscribers while the remaining reserved for subscribers. This paper focuses on a hybrid access mechanism for multi-channel femtocells which employ orthogonal spectrum access schemes. Considering a randomized channel assignment strategy, we analyze the performance in the downlink. Using stochastic geometry as technical tools, we model the distribution of femtocells as Poisson point process or Neyman-Scott cluster process and derive the distributions of signal-to-interference-plus-noise ratios, and mean achievable rates, of both nonsubscribers and subscribers. The established expressions are amenable to numerical evaluation, and shed key insights into the performance tradeoff between subscribers and nonsubscribers. The analytical results are corroborated by numerical simulations.
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