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SCAROS: A Scalable and Robust Self-Backhauling Solution for Highly Dynamic Millimeter-Wave Networks

机译:Scaros:用于高动态毫米波网络的可扩展和坚固的自我回程解决方案

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Millimeter-wave (mmWave) backhauling is key to ultra-dense deployments in beyond-5G networks because providing every base station with a dedicated fiber-optic backhaul link to the core network is technically too complicated and economically too costly. Self-backhauling allows the operators to provide fiber connectivity only to a small subset of base stations (Fiber-BSs), whereas the rest of the base stations reach the core network via a (multi-hop) wireless link towards the Fiber-BS. Although a very attractive architecture, self-backhauling is proven to be an NP-hard route selection and resource allocation problem. The existing self-backhauling solutions lack practicality because: $(i)$ they require solving a fairly complex combinatorial problem every time there is a change in the network (e.g., channel fluctuations), or $(ii)$ they ignore the impact of network dynamics which are inherent to mobile networks. In this article, we propose SCAROS which is a semi-distributed learning algorithm that aims at minimizing the end-to-end latency as well as enhancing the robustness against network dynamics including load imbalance, channel variations, and link failures. We benchmark SCAROS against state-of-the-art approaches under a real-world deployment scenario in Manhattan and using realistic beam patterns obtained from off-the-shelf mmWave devices. The evaluation demonstrates that SCAROS achieves the lowest latency, at least $1.8imes $ higher throughput, and the highest flexibility against variability or link failures in the system.
机译:毫米波(MMWAVE)回程是超密集部署的关键是超密集的网络网络,因为提供了与核心网络的专用光纤回程链路的每个基站在技术上过于复杂,经济地太高。自我回程允许操作员仅向小型基站(光纤-BS)的小子集提供光纤连接,而基站的其余部分通过朝向光纤BS的(多跳)无线链路到达核心网络。虽然建筑非常有吸引力,但被证明是一个NP硬路线选择和资源分配问题。现有的自我回程解决方案缺乏实用性,因为:$(i)$每次需要解决相当复杂的组合问题,每次有网络(例如,频道波动),或$(ii)$他们忽略的影响网络动态是移动网络固有的。在本文中,我们提出了一种Scaros,它是一种半分布式学习算法,其旨在最小化端到端延迟,以及增强对网络动态的鲁棒性,包括负载不平衡,通道变化和链路故障。我们在曼哈顿的真实部署方案下,利用从现成的MMWVE设备获得的现实光束图案来利用最先进的方法进行基准。评估表明,Sifos实现了最低的延迟,至少1.8倍吞吐量,以及系统中可变异性或链路故障的最高灵活性。

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