Today's intra-frequency hard handovers in LTE suffer from interruption even if they are successful as well as risk of failures. The next generation, New Radio, will introduce stricter requirements that cannot be fulfilled with the traditional hard handover concept. Namely, a handover with 0 ms interruption is mandated, and extreme reliability (ultra-reliable low-latency communication services) will not tolerate any mobility failures. Consequently, softer handover concepts where the UE is multi-connected to a source and one or more target cells are already under discussion. This article investigates such a method using the well-known dual connectivity principle and evaluates the performance in terms of robustness/ reliability and signaling costs.

中文翻译：

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零零移动：零中断、零故障的同频切换


如今，LTE 中的同频硬切换即使成功也会遭受中断以及失败的风险。下一代新无线电将引入传统硬切换概念无法满足的更严格的要求。即，强制进行0毫秒中断的切换，并且极高的可靠性（超可靠的低延迟通信服务）不会容忍任何移动性故障。因此，UE 多重连接到源小区和一个或多个目标小区的更软切换概念已经在讨论中。本文使用众所周知的双连接原理研究这种方法，并评估鲁棒性/可靠性和信令成本方面的性能。