On the co-channel femtocells exclusion region in fractional frequency reuse macrocells
On the co-channel femtocells exclusion region in fractional frequency reuse macrocells
复制标题
部分频率复用宏蜂窝中的同信道毫微微蜂窝排除区域
DOI：
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复制
发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Hamdi
中科院分区：
文献类型：
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作者：
Azwan Mahmud;K. Hamdi
由于发射器和接收器之间的距离较短，femtocell能够实现高容量并改善室内覆盖，而在新兴的OFDMA网络中，已经提出了分数频率复用（FFR）来提高频谱效率。由于频谱限制，FFR宏基站和飞基站可能共享相同的许可频谱，因此由于巨大的两层共信道干扰，无意中产生了可能的死点问题。通过中断概率分析，我们得出了同信道的飞基站能够重用与FFR网络相同的信道所需的最小距离。结果表明，在不同的信道参数和功率比组合下，FFR中至少可以存在一个FER，并且可以存在两个FER；一个在细胞中心区域，另一个在细胞边缘区域。为了提高系统性能，提出了一种新的静态飞基站资源分配策略。
Femtocells are capable of achieving high capacity and improving indoor coverage due to a shorter distance between the transmitter and receiver, while fractional frequency reuse (FFR) has been proposed to improve spectral efficiency in emerging OFDMA networks. Due to spectrum limitations, FFR macrocell and femtocells are likely to share the same licensed spectrum, thereby inadvertently creating a possible dead-spot problem due to huge two-tier co-channel interferences. Using outage probability analysis, we derive the femtocell exclusion region (FER) or the minimum distance required for the co-channel femtocell to be able to reuse the same channels as the FFR networks. We show that a minimum of one FER could exist in FFR and at different combination of channel parameters and power ratio, two FER could exist; one in the cell-centre region and the other in the cell-edge region. A new static femtocell resource allocation strategy to improve the system performance is proposed.
影响因子：
10.4
作者：
Xiaoli Chu;Yuhua Wu;D. López-Pérez;Xiaofeng Tao
通讯作者：
Xiaoli Chu;Yuhua Wu;D. López-Pérez;Xiaofeng Tao