论文标题
在有限责任的能力超密集网络中支持HTC/MTC的多重关联支持HTC/MTC
Multiple-Association Supporting HTC/MTC in Limited-Backhaul Capacity Ultra-Dense Networks
论文作者
论文摘要
人类通信（HTC）和机器型通信（MTC）的共存是不可避免的。超密集的网络（UDNS）将有效支持两种类型的通信。在UDN中，将大量的低功率和低成本小单元（SC）部署，密度高于HTC用户。在这种情况下，回程容量构成了系统的内在瓶颈。因此，我们提出了一个多重关联方案，每个HTC用户都将多个SC相关联并激活多个SC以克服回程容量约束。此外，拥有更多的活性单元格允许网络支持更多的MTC设备。使用随机几何形状的工具，我们制定了一个新型的数学框架，该框架研究了HTC和MTC的面积光谱效率（ASE）和支持的MTC设备的密度。进行了广泛的模拟，以验证不同系统参数下数学分析的准确性。结果表明，HTC用户可以在回程容量约束下连接到最佳数量的SC。此外，提出的多重关联方案可显着改善MTC的性能，从而在受支持的设备的ASE和密度方面提高了性能。
Coexistence of Human-Type Communications (HTCs) and Machine-Type Communications (MTCs) is inevitable. Ultra-Dense Networks (UDNs) will be efficacious in supporting both types of communications. In a UDN, a massive number of low-power and low-cost Small Cells (SCs) are deployed with density higher than that of the HTC users. In such a scenario, the backhaul capacities constitute an intrinsic bottleneck for the system. Hence, we propose a multiple association scheme where each HTC user associates to and activates multiple SCs to overcome the backhaul capacity constraints. In addition, having more active cells allows for more MTC devices to be supported by the network. Using tools from stochastic geometry, we formulate a novel mathematical framework investigating the performance of the limited-backhaul capacity UDN in terms of Area Spectral Efficiency (ASE) for both HTC and MTC and the density of supported MTC devices. Extensive simulations were conducted to verify the accuracy of the mathematical analysis under different system parameters. Results show the existence of an optimum number of SCs to which an HTC user may connect under backhaul capacity constraints. Besides, the proposed multiple association scheme significantly improves the performance of MTC in terms of both ASE and density of supported devices.
