Multi-Channel Hybrid Access Femtocells: A Stochastic Geometric Analysis
Multi-Channel Hybrid Access Femtocells: A Stochastic Geometric Analysis
复制标题
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
中科院分区:
文献类型:
--
作者:
Zhong, Yi;Zhang, Wenyi
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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