Dynamic RSRP Threshold Adjustment for Uplink Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mobile networks face challenges in maximizing wireless cell coverage to keep user equipment (UE) devices connected on preferred frequency-bands while maintaining desired uplink signal quality, especially under varying network loading conditions.
Innovation Solution
The solution involves dynamically adjusting the Reference Signal Received Power (RSRP) thresholds for handoffs based on computed Interference over Thermal noise (IoT) levels, allowing for maximum uplink coverage on cells with preferred frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If lower-band frequencies are used, then wireless coverage area is increased, but data-transfer speed decreases
Solution Approach 1:
The patent implements dynamic adjustment of RSRP thresholds based on real-time interference conditions. The threshold is not fixed but adapts to changing network loading conditions, allowing the system to optimize the balance between coverage area and data-transfer speed dynamically. When interference is low, higher thresholds enable preferred band usage for faster speeds; when interference is high, lower thresholds maintain coverage by falling back to alternative bands.
2Speed
If higher-band frequencies are used, then data-transfer speed is increased, but wireless coverage area decreases
Solution Approach 1:
The patent changes the RSRP threshold parameter dynamically based on interference conditions. By adjusting this threshold parameter, the system can shift the operating point between different frequency bands. When the threshold is raised under low-interference conditions, the system prefers higher-band frequencies for faster data transfer. When the threshold is lowered under high-interference conditions, the system transitions to lower-band frequencies to maintain coverage area.
3Area of stationary object
If RSRP thresholds are increased to maximize preferred band coverage, then uplink signal quality may deteriorate under high interference conditions
Solution Approach 1:
The patent implements a feedback mechanism where the RSRP threshold is continuously adjusted based on measured interference conditions. The system monitors interference levels and uses this feedback to modify the threshold dynamically. This closed-loop control ensures that coverage area is maximized only when interference conditions permit, thereby maintaining uplink signal quality and reliability even as coverage boundaries shift.
4Device complexity
If static RSRP thresholds are used, then system complexity is reduced, but adaptability to varying network loading conditions decreases
Solution Approach 1:
The patent transitions from static to dynamic threshold management. The RSRP threshold becomes a dynamic parameter that automatically adapts to varying network loading conditions through continuous interference monitoring and adjustment. This dynamic approach significantly improves adaptability to different network conditions while adding only moderate complexity through standardized threshold adjustment mechanisms.
Data Source
AI summary
Systems and methods provide for dynamic updates of downlink (DL) Reference Signal Received Power (RSRP) thresholds to maximize uplink (UL) coverage on cells with a preferred frequency band. A network device identifies a desired minimum UL signal-to-interference-plus-noise ratio (SINR) value for a source cell; maps the minimum UL SINR value to a corresponding DL RSRP value for the source cell; and determines, based on the DL RSRP value, a loaded DL RSRP value that reflects an estimated interference level for a time period. The network device provides one or more DL RSRP thresholds for implementation in the source cell based on the loaded DL RSRP value.