Adaptive Positioning Reference Signal Bandwidth for Lower UE Power
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in determining the location of user equipment (UE) due to the high power consumption required for receiving positioning reference signals, which limits battery life and operational time.
Innovation Solution
Adapting the bandwidth of positioning reference signals based on target accuracy and quality of service requirements, allowing for reduced power consumption by configuring the UE to receive only the necessary bandwidth for accurate positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bandwidth of positioning reference signals is increased to improve positioning accuracy, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the positioning reference signal bandwidth adaptive rather than fixed. The network dynamically adjusts the bandwidth based on the actual positioning accuracy requirements of different UEs, allowing the system to optimize between accuracy and power consumption in real-time based on service needs
Solution Approach 2:
The patent changes the bandwidth parameter of positioning reference signals dynamically. By configuring different bandwidth values (e.g., first bandwidth for high accuracy, second bandwidth for low accuracy) and switching between them based on UE requirements, the system resolves the contradiction between measurement precision and energy consumption
2Measurement precision
If the bandwidth of positioning reference signals is increased to improve positioning accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the bandwidth configuration into discrete options (first bandwidth and second bandwidth) that are pre-defined and signaled to UEs. This segmentation simplifies the UE's decision-making process by reducing continuous configuration space to manageable discrete choices, thereby lowering device complexity while maintaining positioning accuracy
3Use of energy by moving object
If the bandwidth of positioning reference signals is reduced to save power, then power consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies partial action by configuring UEs to receive only the necessary bandwidth portion of positioning reference signals. Instead of requiring full bandwidth always, the system provides just enough bandwidth (partial action) to meet the minimum positioning accuracy requirements, thereby reducing power consumption while maintaining adequate measurement precision
Data Source
AI summary
Techniques are provided for reducing the bandwidth required to receive reference signals with a user equipment (UE). An example method for positioning reference signal bandwidth adaptation includes determining a target accuracy, determining a positioning reference signal bandwidth based on the target accuracy, and transmitting a positioning reference signal based on the positioning reference signal bandwidth.