The use of unlicensed bands is one of the most promising features envisaged to increase capacity in 5G. However, this poses multiple challenges associated with the operation when coexisting networks are present, such as WiFi. Previous coexistence analyses have been focused on the user-plane data-related transmissions and mainly based on abstract models. Meanwhile, the effects of the shared channel signaling defined by the standards have been mostly disregarded, particularly for ultra-dense scenarios. This paper assesses how the shared data channel signaling mechanisms influence the performance of the coexisting technologies operating unlicensed bands in indoor environments. Based on this analysis, some DRS signaling modifications are envisaged to additionally enhance the service provision and fairness towards WiFi in these scenarios.

使用无执照频段是增加5G容量的最有希望的功能之一。但是，当存在共存网络（例如WiFi）时，这就带来了与操作相关的多个挑战。先前的共存分析主要集中在与用户平面数据相关的传输上，并且主要基于抽象模型。同时，大多数标准都忽略了标准定义的共享信道信令的影响，特别是对于超密集场景。本文评估了共享数据信道信令机制如何影响在室内环境中操作无执照频段的共存技术的性能。基于此分析，可以设想一些DRS信令修改，以在这些情况下额外增强服务的提供和对WiFi的公平性。