A Multicast Technique for Fixed and Mobile Optical Wireless Backhaul in 5G Networks
A Multicast Technique for Fixed and Mobile Optical Wireless Backhaul in 5G Networks
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DOI：
10.1109/access.2018.2832980
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发表时间：
2018-05
期刊：
影响因子：
3.9
通讯作者：
M. Atakora;H. Chenji
中科院分区：
文献类型：
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作者：
M. Atakora;H. Chenji
预计5G网络的数据需求将远远高于当前的吞吐量要求。为了满足这一需求，需要互连的小小区的密集拓扑。在如此密集的网络中铺设新的铜线和光纤将是成本高昂的。因此，迫切需要高容量无线点对多点回程解决方案。在本文中，我们提供了在5G回程网络中使用自由空间光学技术实现高速数据速率物理层广播和多播的解决方案概要。我们表明，在移动的场景下，具有高度方向性的光链路的最优组播问题是一个时间依赖的奖金收集旅行推销员问题，这是NP-难的。在制定我们的问题，我们开发了一种新的奖品分配策略，保证选择相互不相交的组播集。由于该问题是NP难的，我们提供了几个潜在的算法在固定和移动的场景中的组播，并提出了一个全面的性能评估的发展计划。
The data demand for 5G networks is expected to be much higher than current throughput requirements. To meet this demand, a dense topology of interlinked small cells is needed. Laying new copper and fiber in such a dense network would be cost prohibitive. There is, therefore, an urgent need for high capacity wireless point-to-multipoint backhaul solutions. In this paper, we provide a compendium of solutions for ultrahigh data rate physical-layer broadcast and multicast using free space optics in 5G backhaul networks. We show that the problem of optimal multicast in mobile scenarios with highly directional optical links is a time-dependent prize collecting traveling salesman problem which is NP-hard. In formulating our problem, we develop a novel prize assignment strategy that guarantees the selection of mutually non-disjoint multicast sets. Due to the problem being NP-hard, we provide several potential heuristics for multicast in fixed and mobile scenarios, and present a comprehensive performance evaluation of the developed schemes.