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LTE System Design for Urban Light Rail Transport

机译:城市轻轨运输的LTE系统设计

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摘要

This paper deals with the performance of LTE-A (Long Term Evolution-Advanced) cellular networks for supporting operational, safety-critical signaling, and standard IT services for urban transportation. Our interests have been focused on Light Rail Transit (LRT) signaling performance for the Song-jiang (China) tramway project. Several stationary and mobility use cases have been considered and mean end-to-end delay and Packet Loss Rate (PLR) key performance indicators have been evaluated. Simulation results highlight that, in stationary conditions, LRT signaling performance requirements are fulfilled, while PLR performance degrades when mobility is introduced. Furthermore, we have evaluated the impact of non-critical IT traffic (e.g., UDP-based video) on TCP-based signaling by demonstrating that signaling throughput is not affected by video in stationary scenarios, whereas, in the presence of mobility, handovers degrade signaling performance, which can be guaranteed only if a QoS-aware scheduler is adopted. In conclusions, our results demonstrate that LTE-A can safely support operative and non-critical applications in urban transportation scenarios, where strong connectivity requirements are crucial.
机译:本文探讨了LTE-A(高级长期演进)蜂窝网络的性能,以支持运营,安全关键型信令以及用于城市交通的标准IT服务。我们的兴趣一直集中在松江(中国)电车项目的轻轨交通(LRT)信号性能上。已经考虑了几种固定和移动用例,并评估了平均端到端延迟和数据包丢失率(PLR)关键性能指标。仿真结果表明,在固定条件下,可以满足LRT信令性能要求,而引入移动性则会降低PLR性能。此外,我们通过证明静态情况下信令吞吐量不受视频影响,评估了非关键IT流量(例如,基于UDP的视频)对基于TCP的信令的影响,而在存在移动性的情况下,切换性能降低了信令性能,只有采用QoS感知的调度程序才能保证此性能。总而言之,我们的结果表明,LTE-A可以在对强连接性要求至关重要的城市交通场景中安全地支持操作性和非关键性应用。

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