Inter-PLMN Handover Control Using SINR, RSRP, and Cell Load
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Solution Overview
Problem
Existing inter-PLMN handover processes in telecommunication networks primarily rely on Reference Signal Received Power (RSRP) thresholds, which do not effectively manage roaming costs and network load, leading to inefficient use of resources and increased charges for Home PLMNs.
Innovation Solution
A method and system that utilize Signal to Interference & Noise Ratio (SINR) and RSRP thresholds, combined with predictive models like AI/ML, to determine and manage handovers between PLMNs, considering cell load and network quality, thereby optimizing network services and reducing roaming charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If handover is based primarily on RSRP thresholds, then handover decisions are simple to implement, but network quality and roaming cost optimization are insufficient
Solution Approach 1:
The patent changes the decision parameters from单一的RSRP threshold to a multi-parameter evaluation system including SINR, RSRP, cell load, and roaming cost. This allows the handover decision to consider both signal quality (SINR>threshold_SINR and RSRP>threshold_RSRP) and network conditions (cell load), resolving the contradiction between simple implementation and reliable optimization.
2Adaptability or versatility
If handover to VPLMN is allowed freely, then network coverage is improved, but roaming charges increase
Solution Approach 1:
The patent implements a feedback mechanism where the handover decision system continuously monitors roaming cost parameters and network conditions. When the HPLMN cell load is below threshold or signal quality is sufficient, the system provides feedback to prohibit handover to VPLMN, thereby reducing roaming charges while maintaining adequate network coverage through conditional允许.
Solution Approach 2:
The system dynamically changes the handover permission parameter based on roaming cost considerations. By evaluating multiple parameters including whether the target is HPLMN or VPLMN, current cell load, and signal quality, the system optimizes the balance between coverage and cost by selectively enabling or disabling handover to VPLMN.
3Reliability
If handover decisions consider multiple parameters (SINR, RSRP, cell load), then network optimization improves, but decision complexity increases
Solution Approach 1:
The patent segments the handover decision process into distinct evaluation stages: signal quality assessment (SINR and RSRP thresholds), network condition assessment (cell load thresholds), and cost consideration (HPLMN vs VPLMN). This segmentation allows the complex multi-parameter decision to be implemented through a structured, modular approach that improves reliability while managing complexity.
Data Source
AI summary
A method and system for providing network services in a region involves managing handovers (HO) between a source Public Land Mobile Network (PLMN) and a target PLMN. User Equipment (UE) receives radio signals from both PLMNs and receives/determines at least a Signal to Interference & Noise Ratio (SINR) and Reference Signal Received Power (RSRP) of the radio signal. A determination is made whether a HO is permitted or prohibited based on whether the target RSRP and SINRs from both PLMNs exceed certain thresholds. Additional criteria for permitting or prohibiting HO include cell load conditions. Predictive models, potentially using Artificial Intelligence/Machine Learning (AI/ML), may predict HOs based on roaming data. The PLMNs may operate across various cellular technologies, including GSM/2G, UMTS/3G, LTE/4G, or NR/5G.