Base Station Reference Signal Power Control for Coverage Interference Trade-off
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Solution Overview
Problem
As wireless service providers deploy more base stations, particularly small cells, managing reference-signal transmission power becomes impractical due to varying adjacency and coverage overlap, leading to undesirably low or high signal quality for users at the edge of coverage areas, which can result in poor user experience and interference issues.
Innovation Solution
Adjusting the reference-signal transmission power of base stations based on the coverage quality reported by devices located at the halfway point between adjacent base stations, incrementing or decrementing power as needed to maintain optimal coverage quality at this midpoint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If base stations transmit reference signals at high power to extend coverage area, then coverage range is improved, but interference with adjacent base stations increases
Solution Approach 1:
The base station dynamically adjusts its reference signal transmission power based on real-time coverage quality measurements from user devices at the halfway point between adjacent base stations. The power is incremented when coverage quality is insufficient and decremented when coverage quality is adequate, allowing the system to adaptively balance coverage extension and interference reduction.
Solution Approach 2:
The system implements a feedback mechanism where user devices report coverage quality metrics (such as reference signal receive power and signal-to-interference-plus-noise ratio) back to the base station. This feedback information is used to control the transmission power adjustment, creating a closed-loop system that responds to actual coverage conditions.
2Object-generated harmful factors
If base stations transmit reference signals at low power to reduce interference, then interference is reduced, but coverage quality at the edge deteriorates
Solution Approach 1:
The base station dynamically adjusts its reference signal transmission power based on real-time coverage quality measurements from user devices at the halfway point between adjacent base stations. The power is incremented when coverage quality is insufficient and decremented when coverage quality is adequate, allowing the system to adaptively balance coverage extension and interference reduction.
Solution Approach 2:
The base station autonomously monitors its own coverage quality through reports from user devices and independently adjusts its transmission power without requiring manual intervention. The system serves itself by using coverage quality feedback to automatically control power levels, maintaining optimal performance.
3Manufacturing precision
If manual power adjustment is used for each base station, then power control precision is improved, but system complexity increases
Solution Approach 1:
The base station autonomously monitors its own coverage quality through reports from user devices and independently adjusts its transmission power without requiring manual intervention. The system serves itself by using coverage quality feedback to automatically control power levels, maintaining optimal performance.
Solution Approach 2:
The system implements a feedback mechanism where user devices report coverage quality metrics (such as reference signal receive power and signal-to-interference-plus-noise ratio) back to the base station. This feedback information is used to control the transmission power adjustment, creating a closed-loop system that responds to actual coverage conditions.
Data Source
AI summary
A method and system to help manage reference-signal transmission power. A base station's reference-signal transmission power will be adjusted based on consideration of the coverage quality of one or more WCDs that are located at or near a mid-point between the base station and an adjacent other base station. In particular, if a threshold extent of coverage quality reports for the base station's reference signal received at or near the mid-point are threshold low, then the serving base station could responsively increment its reference-signal transmission power and/or responsively cause the adjacent base station to decrement its reference-signal transmission power. Whereas, if a threshold extent of such coverage quality reports are threshold high, then the serving base station could responsively decrement its reference-signal transmission power and/or responsively cause the adjacent base station to increment its reference signal transmission power.