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Multiple-Association Supporting HTC/MTC in Limited-Backhaul Capacity Ultra-Dense Networks
IEEE Transactions on Communications ( IF 7.2 ) Pub Date : 2021-02-26 , DOI: 10.1109/tcomm.2021.3062649
Mohammed Elbayoumi , Walaa Hamouda , Amr Youssef

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 mainly encountered in the downlink. 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 HTC in both downlink and uplink as well as the uplink MTC. Stretched Exponential Path Loss (SEPL) model is considered to practically reflect the UDN environment. 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 improves the performance of MTC in terms of both ASE and density of supported devices.

中文翻译:

在有限回程容量超密集网络中支持 HTC/MTC 的多关联

人类类型通信 (HTC) 和机器类型通信 (MTC) 的共存是不可避免的。超密集网络 (UDN) 将有效支持两种类型的通信。在 UDN 中,部署了大量低功耗、低成本的 Small Cell(SC),其密度高于 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,我们提出了一种多重关联方案,其中每个 HTC 用户关联并激活多个 SC,以克服主要在下行链路中遇到的回程容量限制。此外,拥有更多活动小区允许网络支持更多 MTC 设备。使用来自随机几何的工具,我们制定了一个新的数学框架来研究 HTC 在下行链路和上行链路以及上行链路 MTC 的性能。拉伸指数路径损耗 (SEPL) 模型被认为实际上反映了 UDN 环境。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。结果表明存在最佳数量的 SC,HTC 用户可以在回程容量限制下连接到这些 SC。此外,所提出的多关联方案在 ASE 和支持设备的密度方面提高了 MTC 的性能。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。结果表明存在最佳数量的 SC,HTC 用户可以在回程容量限制下连接到这些 SC。此外,所提出的多关联方案在 ASE 和支持设备的密度方面提高了 MTC 的性能。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。结果表明存在最佳数量的 SC,HTC 用户可以在回程容量限制下连接到这些 SC。此外,所提出的多关联方案在 ASE 和支持设备的密度方面提高了 MTC 的性能。
更新日期:2021-02-26
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