Modelling and Evaluation of Uplink and Downlink KPI Variations using Information Bottleneck and Non-parametric Hypothesis

Abstract

The automotive industry framework is being slowly transformed from plain design of conventional vehicle cabin to modified windows with purpose to protect the passengers from infrared (IR) and ultraviolet (UV) radiation. The current design of vehicles is still focused on offering different levels of protections. Commonly, front side windshield offers better protection than rear door windows. Due to current design, the RF propagation is disturbed and thus the cellular communication is substantially affected. To address the aforementioned issue, we perform field measurements at 1800MHz for timely-synchronized user equipments (UEs) located inside and outside of the conventional vehicle under test (VUT). The proposed measurement setup mimics the quasi-real usage of end users considering data applications. Therefore, in this paper we specifically analyse received and transmitted power of UEs in context of vehicular penetration loss (VPL) on nominal environments. We approach the problem of identifying nominal environments with information bottleneck algorithm. This algorithm enables the assessment of strong changes of statistics of metrics. Furthermore, we propose an approach as a combination of bootstrapping and non-parametric hypothesis, which allows to model deteriorations of the inside against outside of the vehicle UE.

The automotive industry framework is being slowly transformed from plain design of conventional vehicle cabin to modified windows with purpose to protect the passengers from infrared (IR) and ultraviolet (UV) radiation. The current design of vehicles is still focused on offering different levels of protections. Commonly, front side windshield offers better protection than rear door windows. Due to current design, the RF propagation is disturbed and thus the cellular communication is substantially affected. To address the aforementioned issue, we perform field measurements at 1800MHz for timely-synchronized user equipments (UEs) located inside and outside of the conventional vehicle under test (VUT). The proposed measurement setup mimics the quasi-real usage of end users considering data applications. Therefore, in this paper we specifically analyse received and transmitted power of UEs in context of vehicular penetration loss (VPL) on nominal environments. We approach the problem of identifying nominal environments with information bottleneck algorithm. This algorithm enables the assessment of strong changes of statistics of metrics. Furthermore, we propose an approach as a combination of bootstrapping and non-parametric hypothesis, which allows to model deteriorations of the inside against outside of the vehicle UE.