在本論文中，我們將討論長期演進技術進階版(LTE-A)系統在小區域用戶裝設有微型基地台(femtocell)的環境下，不同的成分載波(Component Carrier)的選擇方式。首先，我們將簡單地說明微型基地台以及長期演進技術進階版中所使用的載波聚合(Carrier Aggregation)技術概念。其次，我們將介紹兩種不同的成分載波的選擇方式：第一種方式為自動成分載波選擇(ACCS)，而另一種則為最小干擾成分載波選擇(MICCS)。這兩種方式都經由兩個步驟：主成分載波(PCC)選擇以及次成分載波(SCC)選擇。這兩種方式的主要差別在於次成分載波的選擇。接著我們將針對此兩種方式進行深入且廣泛的性能分析與評比。舉例來說，我們討論了訊號對干擾雜訊比(SINR)門檻值對ACCS的影響，以及干擾總量的加權因子(weighting factor)對MICCS的影響。最後我們也針對相關的研究議題提出數個可行的建議。

In this thesis, we discuss different methods of selecting component carriers (CC) in LTE-A (long term evolution - advanced) system with configuration of femtocells in local area environment. First, we will briefly illustrate the concepts of femtocell and carrier aggregation technology in LTE-A. Second, we introduce two different component carrier selection methods: one is called autonomous component carrier selection (ACCS), and the other is called minimum interference component carrier selection (MICCS). Both methods are based on two steps: primary component carrier (PCC) selection and secondary component carrier (SCC) selection. The main difference between the two methods lies in the SCC selection scheme. Then, we make some extended analysis, which have not been included in the literature. For example, we further discuss the effect of signal to interference plus noise ratio (SINR) threshold for ACCS, and the effect of weighting factor in interference contribution (IC) for MICCS. Finally, in the simulation, we discuss both advantages and disadvantages of ACCS and MICCS. Furthermore, we make some comparisons between these two component carrier selection methods with restriction of the numbers of most component carriers that each femtocell base station can select in order to make a fairer analysis. In the end, several suggestions for possible research topics in the future are also proposed.

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