论文标题
动态-TDD干扰障碍方法和宏观细胞部署中的性能分析
Dynamic-TDD Interference Tractability Approaches and Performance Analysis in Macro-Cell and Small-Cell Deployments
论文作者
论文摘要
在数据流量量的持续增长下，动态时间分级双工（D-TDD）已被引入作为解决上行链路（UL）和下行链路（DL）流量不对称性的解决方案，主要是针对密集的异质网络部署观察到的，因为它是基于瞬时的交通估算，并提供了更多的资源分配。但是，此功能的使用需要新的干扰缓解方案，能够在相反的传输方向上处理两种其他类型的干扰：DL到UL到UL和UL到DL干扰。这项工作的目的是提供一种完整的分析方法，以模拟宏观细胞和密集的小细胞网络中的细胞间干扰。我们在网络的每个位置（在DL和UL中的每个位置）中得出了干扰与信号比（ISR）的明确表达，以量化每种干扰对系统性能的影响。另外，我们通过覆盖不同的方案提供了覆盖概率的明确表达方式作为不同系统参数的函数。最后，通过系统级模拟，我们分析了D-TDD实现在两个部署中的可行性，并将其性能与静态-TDD（S-TDD）配置进行了比较。
Meeting the continued growth in data traffic volume, Dynamic Time Division Duplex (D-TDD) has been introduced as a solution to deal with the uplink (UL) and downlink (DL) traffic asymmetry, mainly observed for dense heterogeneous network deployments, since it is based on instantaneous traffic estimation and provide more flexibility in resource assignment. However, the use of this feature requires new interference mitigation schemes capable to handle two additional types of interference between cells in opposite transmission direction: DL to UL and UL to DL interference. The aim of this work is to provide a complete analytical approach to model inter-cell interference in macro-cell and dense small-cell networks. We derive the explicit expressions of Interference to Signal Ratio (ISR) at each position of the network, in both DL and UL, to quantify the impact of each type of interference on the system performance. Also, we provide the explicit expressions of the coverage probability as functions of different system parameters by covering different scenarios. Finally, through system level simulations, we analyze the feasibility of D-TDD implementation in both deployments and we compare its performance to the static-TDD (S-TDD) configuration.
