Terminal Device Transmit Power Control for Uplink Efficiency
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Solution Overview
Problem
In LTE communication systems, appropriate communication control and power control are not adequately performed, leading to deteriorated transmission efficiency between base station apparatus and terminal devices.
Innovation Solution
A terminal device and base station apparatus configuration that adjusts transmit power for the physical uplink shared channel based on the transmission of a physical random access channel in cell groups, and higher layer parameters are set to manage guaranteed power for each base station in the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmit power for physical uplink shared channel is not adjusted based on physical random access channel transmission status, then transmission efficiency deteriorates, but power control complexity increases
Solution Approach 1:
The patent changes the transmit power parameter of the physical uplink shared channel based on the transmission status of the physical random access channel. Specifically, when the physical random access channel is transmitted in a first cell group, the transmit power for the physical uplink shared channel in a second cell group is adjusted according to the power used for random access transmission, thereby improving transmission efficiency without requiring complex multi-parameter control mechanisms
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device determines the transmit power for the physical uplink shared channel based on the actual transmission status and power level of the physical random access channel. This feedback loop allows the system to adapt power allocation dynamically, improving transmission efficiency while maintaining manageable control complexity through standardized power adjustment rules
2Productivity
If guaranteed power parameters are configured for each base station apparatus, then power allocation optimization improves, but system configuration complexity increases
Solution Approach 1:
The patent segments the cellular system into multiple cell groups (first cell group and second cell group) with distinct power control configurations. By configuring guaranteed power parameters separately for each base station apparatus and applying them to specific cell groups, the system optimizes power allocation for improved communication efficiency while managing configuration complexity through structured segmentation
Solution Approach 2:
The patent applies different guaranteed power parameters to different base station apparatuses and cell groups based on local requirements. Each base station is configured with specific power parameters tailored to its serving cell group, enabling localized optimization of communication efficiency without requiring uniform complex configuration across the entire system
Data Source
AI summary
There is provided a terminal device that communicates with a base station apparatus. The terminal device includes a transmission unit that configures a transmit power for transmission of a physical uplink shared channel in a serving cell belonging to a first cell group based on whether or not a physical random access channel is transmitted in the first cell group and a second cell group in a case where the first cell group and the second cell group are configured.