User Terminal Power Control for Multi-Numerology Slot Overlap
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Solution Overview
Problem
In future radio communication systems like NR, supporting multiple numerologies can lead to inefficient use of maximum transmission power in user terminals, resulting in decreased communication quality and throughput due to variable slot lengths and subcarrier spacings.
Innovation Solution
A user terminal with a transmission section and control section that adjusts transmission power based on whether a slot overlaps with the slot boundary of another cell group, limiting power when overlapping and allocating beyond guaranteed power when not overlapping, to optimize power usage across different numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional dual connectivity power distribution method is applied to NR with multiple numerologies, then power allocation follows existing DC specifications, but maximum transmission power cannot be utilized efficiently and communication throughput deteriorates
Solution Approach 1:
The patent applies dynamics by making the power control policy adaptive and variable based on slot overlap conditions. The control section dynamically switches between different power control policies (first policy for overlapping slots, second policy for non-overlapping slots) depending on the timing relationship between cell groups with different numerologies. This dynamic adaptation allows efficient power utilization across multiple numerologies while maintaining communication quality, directly resolving the throughput deterioration issue.
2Adaptability or versatility
If conventional dual connectivity power distribution method is applied to NR with multiple numerologies, then existing DC specifications are followed, but the burden of the UE increases
Solution Approach 1:
The control section dynamically adapts the power control policy based on slot overlap detection, reducing UE processing burden by applying pre-defined power control rules rather than requiring complex real-time calculations. The UE automatically switches between power control policies based on timing relationships, eliminating the need for elaborate power management algorithms while supporting multiple numerologies.
3Adaptability or versatility
If variable slot lengths are used in multiple numerologies, then flexibility in communication parameters is achieved, but maximum transmission power cannot be utilized efficiently
Solution Approach 1:
The patent applies local quality by implementing different power control strategies for different slot overlap scenarios. When slots overlap, the UE applies a first power control policy that ensures efficient power distribution across overlapping transmissions. When slots do not overlap, a second power control policy is applied that allows full utilization of maximum transmission power. This localized adaptation to specific timing conditions enables efficient power utilization while maintaining variable slot length flexibility.
Solution Approach 2:
The control section dynamically switches between power control policies based on real-time slot overlap detection. This dynamic power control mechanism ensures that maximum transmission power is efficiently utilized regardless of the variable slot lengths imposed by multiple numerologies, directly addressing the power utilization inefficiency problem.
Data Source
AI summary
According to one aspect of the present invention, a user terminal has a transmission section that transmits a signal in a plurality of CGs, including a first cell group (CG) and a second CG corresponding to a longer slot length than the first CG, and a control section that controls transmission power in each CG, and the control section switches a transmission power control policy in a certain slot based on whether or not the certain slot of the first CG overlaps with a slot boundary of the second CG. According to one aspect of the present invention, even when multiple numerologies are supported in a given carrier, it is possible to reduce the decline in communication throughput and so forth.