5G NR Uplink Power Boosting with Neighbor-Cell Interference Control
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Solution Overview
Problem
Existing 5G NR power control methods do not consider interference levels to neighboring cells when boosting uplink transmit power, leading to inefficient throughput and potential interference.
Innovation Solution
A method to boost uplink transmit power of UE by selecting candidates based on pathloss and buffer size, measuring neighboring cell RSRP, and adjusting power using TPC commands to avoid harmful interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE increases its transmit power to increase throughput, then the UE throughput is improved, but the interference to neighboring cells increases
Solution Approach 1:
The patent applies local quality by differentiating power control strategies based on the UE's spatial relationship with neighboring cells. UEs that are far from serving gNBs but close to neighboring gNBs are identified as candidates for power boosting, while other UEs maintain standard power control. This localized approach allows power boosting only where it benefits the serving cell without significantly interfering with neighboring cells, thus resolving the contradiction between improving throughput and minimizing interference.
Solution Approach 2:
The patent implements feedback mechanisms where UEs report their measured downlink pathloss to neighboring gNBs back to the serving gNB. The serving gNB uses this feedback information to determine whether to apply power boosting to each UE. This feedback loop enables dynamic adjustment of transmit power based on real-time interference conditions, allowing the system to maximize throughput while keeping interference to neighboring cells within acceptable limits.
2Reliability
If the standard power control equation is used, then the received power at the serving gNB is controlled, but the interference to neighboring cells is not considered
Solution Approach 1:
The patent merges the standard power control mechanism with an additional interference awareness component. The modified power control equation combines the original pathloss compensation term with a new term that accounts for the UE's pathloss to neighboring gNBs. This merging allows the system to maintain reliable received power control at the serving gNB while simultaneously adapting to neighboring cell interference conditions, thus resolving the contradiction between reliability and adaptability.
Data Source
AI summary
A method to boost uplink transmit power of the UE in at least one of 5G NR and O-RAN wireless communication systems includes: i) selecting, by a serving next generation node B (gNB), at least one candidate user equipment (UE) in a serving cell for boosting transmit power; ii) requesting, by the serving gNB, the at least one candidate UE to measure and report received power from neighboring cells, to estimate pathlosses of the at least one candidate UE to the neighboring cells; iii) selecting, by the serving gNB, the at least one candidate UE as an eligible UE for power boosting in the case the estimated pathlosses of the at least one candidate UE to the neighboring cells is higher than a specified threshold; and iv) boosting, by the serving gNB, transmit power of the eligible UE using Transmit Power Control (TPC) command.