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Efficient mmWave wireless backhauling for dense small-cell deployments

机译:高效的毫米波无线回传,适用于密集的小型小区部署

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Dense small-cell deployments of 5G networks require a wireless backhaul to efficiently connect the small cells to the macro base station (BS). We envision a wireless backhaul architecture where cells are grouped into clusters. One small cell per cluster plays the role of a cluster head connecting the rest of the small cells to the macro cell via a mmWave MIMO link. We formulate the problem of jointly selecting the cluster heads and the number of BS antennas dedicated to each mmWave MIMO link between the BS and each cluster head as a mixed integer nonlinear program (MINLP) and prove its NP-hardness. We propose a Alternate Convex Search Heuristic (ACSH) to handle the tradeoff between having faster backhaul links versus having more cluster heads and show it is near-optimal via extensive simulations. Last, we show that our heuristic has a 20%-50% performance gain compared to prior work.
机译:5G网络的密集小蜂窝部署需要无线回程,才能有效地将小蜂窝连接到宏基站(BS)。我们构想了一种无线回程架构,在该架构中,小区被分组为集群。每个群集一个小小区充当群集头的角色,该群集头通过mmWave MIMO链路将其余的小小区连接到宏小区。我们制定了混合头非线性程序(MINLP),以联合选择簇头和专用于BS与每个簇头之间的每个mmWave MIMO链路的BS天线数量的问题,并证明了其NP硬度。我们提出了一种替代性凸搜索启发式算法(ACSH),以处理具有更快的回程链路与拥有更多簇头之间的权衡,并通过广泛的仿真表明它几乎是最优的。最后,我们证明了与以前的工作相比,我们的启发式方法具有20%-50%的性能提升。

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