Terminal Device Power Control for Dual Connectivity Overlap
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Solution Overview
Problem
In a communication system with multiple cell groups, inadequate power control leads to deteriorated transmission efficiency.
Innovation Solution
A terminal device and base station device that determine the maximum output power for overlapping uplink transmissions between serving cells in different cell groups, using higher layer parameters to set these powers and improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual connectivity is configured with multiple cell groups, then communication coverage and capacity are improved, but transmission efficiency deteriorates due to overlapping uplink transmissions
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the maximum output power level based on the specific configuration of cell groups and their associated parameters (P1, P2, P3, P4) to resolve power overlap conflicts and improve transmission efficiency in dual connectivity scenarios
2Device complexity
If power control is not performed in dual connectivity, then device complexity is reduced, but transmission efficiency is greatly deteriorated
Solution Approach 1:
The patent implements power control through parameter changes by defining specific maximum output power levels (P1-P4) corresponding to different cell group configurations, enabling efficient power management without excessive complexity
Solution Approach 2:
The terminal device autonomously determines the appropriate maximum output power level based on its own configuration of cell groups, eliminating the need for complex external power control mechanisms while maintaining transmission efficiency
Data Source
AI summary
There is provided a terminal device that communicates with a base station device. The terminal device includes: a transmission unit that, in a case where dual connectivity is configured and uplink transmission to a serving cell (first serving cell) belonging to a first cell group (first CG) and uplink transmission to a serving cell (second serving cell) belonging to a second cell group (second CG) overlap with each other, determines a maximum output power in the overlapped portion based on a maximum output power of the first serving cell and a maximum output power of the second serving cell.