Abstract

One of the most important functionalities for the dual connectivity (DC) technology in non-stand-alone (NSA) fifth generation (5G) networks is the flow control algorithm (FCA), which has the role of correctly splitting the data traffic of users in DC. However, delays in backhaul links and the time between two executions of the FCA may limit the effectiveness of the split ratios computed by the FCA in situations where unexpected channel variations or an increase in the traffic load happen. In this context, we propose a heuristic mechanism where the user assists the FCA in performing a faster and finer adjustment of the bearer split ratios. The proposed mechanism works based on a single scalar value and can be combined with any existing FCA. Besides the adjustment of the bearer split ratios, the proposed mechanism may also trigger handover/disconnection when it detects problems in one of the user connections, which is a novel feature that is not present in existing solutions. Simulations demonstrate the gains provided by the proposed mechanism in terms of user satisfaction, total system rate and user throughput.

中文翻译：

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用户支持的承载拆分控制，用于多RAT 5G网络中的双连接

摘要

非独立（NSA）第五代（5G）网络中的双连接（DC）技术最重要的功能之一是流控制算法（FCA），它具有正确分配用户数据流量的作用。在直流。但是，回传链路的延迟以及FCA两次执行之间的时间可能会限制发生意外信道变化或业务负载增加的情况下FCA计算的分流比的有效性。在这种情况下，我们提出了一种启发式机制，其中用户协助FCA对承载拆分比率进行更快更精细的调整。所提出的机制基于单个标量值工作，并且可以与任何现有的FCA结合使用。除了调整承载分配比例外，所提出的机制在检测到用户连接之一中的问题时也可能触发切换/断开连接，这是现有解决方案中不存在的新颖功能。仿真证明了该机制在用户满意度，总系统速率和用户吞吐量方面所提供的收益。