Reducing Handover Outage for Autonomous Vehicles with LTE Hybrid Access
Reducing Handover Outage for Autonomous Vehicles with LTE Hybrid Access
复制标题
通过 LTE 混合接入减少自动驾驶汽车的切换中断
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
P. Mogensen
中科院分区：
文献类型：
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作者：
Mads Lauridsen;T. Kolding;Guillermo Pocovi;P. Mogensen
自动驾驶汽车应用需要低于100 ms的消息延迟，成功概率很高。虽然这将得到即将到来的第五代网络的支持，但使用多个LTE连接的混合接入技术可能会为今天的自动驾驶汽车应用铺平道路。在当前的LTE网络中，拥塞经常导致长时间的数据中断。因此，我们研究了中断和相关的数据中断，以及如何通过混合访问，使用多个连接上的冗余传输来提高性能。该研究基于路测，其中四部QualiPoc测量智能手机同时连接到不同的LTE网络，执行同步的ping延迟测量并记录切换事件。结果表明，在ping测量过程中的切换事件，切换的平均延迟从60-80 ms到超过200 ms。然而，在所测量的LTE网络中，切换不会同时发生。因此，示出了具有两个连接的混合接入以将切换中断减少到因子60。此外，与最佳单个网络测量相比，通过使用两个同时连接，99.9%的瓦片延迟减少了66%。
Autonomous vehicle applications require sub-100 ms message latency with a high success probability. While this will be supported by upcoming fifth generation networks, hybrid access technology using multiple LTE connections, may pave the way for the autonomous vehicle applications today. In current LTE networks, handovers often lead to long data interruption. Therefore, we study the handovers and the related data interruption, and how performance can be improved through hybrid access, using redundant transmissions over multiple connections. The study is based on drive tests, where four QualiPoc measurement smartphones are connected to different LTE networks simultaneously, performing synchronized ping latency measurements, and recording handover events. The results show that a handover event during a ping measurement, prolongs the average latency from 60-80 ms to more than 200 ms. However, the handovers do not occur simultaneously in the measured LTE networks. Therefore, hybrid access with two connections is shown to reduce the handover outage by a factor 60. Furthermore, the 99.9 %-tile latency is reduced 66 %, by using two simultaneous connections, as compared to the best single network measurement.