User Terminal Uplink Power Allocation for Dual Connectivity
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Solution Overview
Problem
In dual connectivity scenarios of next-generation mobile communication systems, the separate uplink transmission power control by multiple radio base stations leads to a decrease in uplink throughput and deterioration of communication quality due to competing power demands.
Innovation Solution
A user terminal sets semi-static maximum transmission power per serving cell and per cell group, using user-terminal-specific values to allocate power efficiently, ensuring that the sum of transmission powers does not exceed the maximum allowed, thereby reducing competition between radio base stations and enhancing reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple radio base stations control uplink transmission power separately in dual connectivity, then each base station can independently manage its own power allocation, but uplink throughput decreases and communication quality deteriorates due to competing power demands
Solution Approach 1:
The patent merges the separate power control functions of multiple radio base stations into a unified power control mechanism. A master base station coordinates with secondary base stations to jointly manage uplink transmission power, allowing centralized optimization of power allocation across all cells while maintaining the benefits of multi-base station connectivity. This resolves the contradiction by combining independent control capabilities into a cooperative framework that improves uplink throughput.
Solution Approach 2:
The patent introduces an intermediary coordination mechanism where the master base station acts as a mediator between multiple secondary base stations. The master base station receives power control information from secondary base stations, performs centralized power allocation optimization, and distributes coordinated power control commands back to all base stations. This intermediary approach enables collaborative power management that prevents power conflicts and improves overall uplink throughput.
2Adaptability or versatility
If multiple radio base stations control uplink transmission power separately, then each base station has autonomous control capability, but communication quality deteriorates due to power competition
Solution Approach 1:
The patent combines the autonomous control capabilities of multiple base stations into a unified power control system. While each base station retains its operational autonomy, the power control functions are merged under centralized coordination to eliminate power conflicts. This merging approach maintains the adaptability and versatility of individual base stations while significantly improving communication quality through cooperative power management.
Solution Approach 2:
The patent implements a feedback mechanism where secondary base stations report their power control status and channel conditions to the master base station. The master base station uses this feedback information to optimize power allocation decisions and adjust power control parameters dynamically. This feedback loop ensures that autonomous base stations operate in a coordinated manner, preventing power conflicts and maintaining high communication quality.
3Ease of manufacture
If separate power control is implemented by each radio base station, then configuration and management is simplified for each individual station, but overall system power efficiency deteriorates
Solution Approach 1:
The patent segments the power control function into two parts: centralized coordination for optimization and distributed execution for simplicity. The master base station performs centralized power allocation optimization to maximize system power efficiency, while secondary base stations execute the coordinated power control commands independently. This segmentation maintains the ease of individual configuration while achieving system-level power efficiency through centralized optimization.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~4
AI summary
The present invention is designed so that, when a user terminal connects with a plurality of radio base stations, the decrease of uplink throughput is reduced. A user terminal according to an example of the present invention provides a user terminal (20) that connects with a plurality of radio base stations (10) including a first radio base station and a second radio base station, and this user terminal has a transmission section (203) that transmits uplink signals to each radio base station, a receiving section (203) that receives terminal-specific information with respect to the first radio base station, related to the maximum transmission power of the uplink signals, and a maximum transmission power setting section (406) that sets the maximum transmission power for the first radio base station based on the terminal-specific information with respect to the first radio base station.