Analysis of The Co-existence of Local and Macro Mobile Networks

Sammanfattning: The transition to 5G technology holds the promise of significant enhancements to existing wireless connectivity. Industries are increasingly inclined to exploit 5G capabilities, utilizing the technology to bolster mobile broadband and ensure ultra-reliable, low-latency communication services within localized 5G networks. These networks empower businesses to wirelessly connect critical services without compromising safety or speed. Despite these aspirations, real-world constraints can impede the optimal performance of such local networks. This thesis introduces a comprehensive model designed to characterize various interference scenarios in both synchronized and unsynchronized configurations between the local and macro networks. The proposed model reveals the feasibility of synchronized deployment, emphasizing the need to address near-far interference indoors and optimize indoor radio conditions for superior signal levels compared to the macro network. This approach ensures all user equipment can seamlessly connect to the local network while eliminating near-far interference. In the case of unsynchronized deployment, the thesis suggests implementing effective wall isolation to safeguard uplink capacity for both local and macro networks. However, downlink capacity may be impacted by cross-link interference as local and macro user equipment move closer. To validate the proposed model, a case study was conducted within the Scania Chassis private network in Sweden. Measurements of indoor and outdoor radio signals indicated a lack of 5G coverage in the factory, prompting the recommendation for continued operation in an unsynchronized configuration until additional 5G deployment by TELE2 in the area.