Small Cell Transmit Power Adjustment via KPI Monitoring
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Solution Overview
Problem
In wireless networks, especially after small cell densification, nearby cells often operate near each other, causing service disruptions and decreased quality of experience for users due to frequent handover procedures and radio link failures, as small cells do not adjust their transmit power based on performance metrics like key performance indicators (KPIs).
Innovation Solution
Network devices associated with small cells monitor KPIs such as handover failures and radio link failures, and adjust their transmit power levels to optimize coverage, reducing the number of handovers and failures, thereby improving user experience and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If small cells operate with high transmit power to provide coverage, then coverage area is improved, but service disruptions and handover failures increase due to overlapping coverage with nearby cells
Solution Approach 1:
The patent implements dynamic transmit power adjustment where small cells continuously monitor KPIs (handover failure rate, radio link failure rate, coverage hole rate) and adapt their transmit power levels in real-time. This transforms the static power configuration into a dynamic system that automatically responds to changing network conditions, resolving the contradiction between maintaining coverage area and reducing service disruptions
Solution Approach 2:
The system establishes a feedback loop where network devices monitor performance metrics (handover failures, radio link failures, coverage holes) and use this information to adjust transmit power levels. The feedback mechanism enables the system to learn from past performance and optimize power allocation, simultaneously improving coverage reliability while maintaining adequate coverage area
2Reliability
If small cells adjust transmit power dynamically based on KPIs, then service disruptions are reduced, but device complexity and computational requirements increase
Solution Approach 1:
The patent enables small cells to autonomously monitor their own performance metrics and self-adjust their transmit power levels without requiring complex centralized control or manual intervention. Each network device independently evaluates its KPIs and makes power adjustment decisions, simplifying the overall system architecture while improving service reliability through distributed intelligence
3Reliability
If small cells maintain high transmit power to ensure coverage, then coverage reliability is improved, but energy consumption and resource waste increase
Solution Approach 1:
The system dynamically changes the transmit power parameter based on actual network conditions and KPI thresholds. Instead of maintaining constant high power, the system adjusts power levels up or down depending on measured performance metrics, achieving coverage reliability only when necessary and reducing energy consumption during normal operating conditions
Data Source
AI summary
In some implementations, a network device may determine, based on powering up the network device, a first transmit power level associated with the cell. The network device may monitor one or more key performance indicators (KPIs) associated with a coverage of the cell. The network device may determine that at least one KPI, of the one or more KPIs, satisfies a threshold. The network device may determine, based on the at least one KPI satisfying the threshold, that the first transmit power level should be adjusted. The network device may adjust the first transmit power level, resulting in a second transmit power level associated with the cell.