Multicarrier Uplink Power Control via Segmented TPC Commands
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Solution Overview
Problem
Current uplink power control methods in wireless communication systems are inadequate for multicarrier systems, as they do not effectively manage power control for multiple uplink carriers, which is essential for efficient communication in systems like LTE-Advanced.
Innovation Solution
A method and apparatus that determine the required power for multiple carriers and generate power control commands to distribute power among them, enabling effective uplink power control in multicarrier systems by using a controller to decode and distribute power control commands across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uplink power control is configured for controlling transmit power of channels on one uplink carrier (as in LTE Release 8), then power control for single carrier is achieved, but it becomes inapplicable to multicarrier systems having multiple uplink and downlink carrier configurations
Solution Approach 1:
The patent segments the power control configuration by introducing separate power control parameters and command structures for each uplink carrier. The base station generates individual power control commands (TPC commands) for each uplink carrier, allowing independent power control management for each carrier while maintaining a unified overall control framework.
2Productivity
If multiple uplink carriers are supported in multicarrier systems, then communication capacity and efficiency are improved, but effective power control management for multiple carriers becomes inadequate
Solution Approach 1:
The patent implements feedback mechanisms where the base station receives power control feedback from the UE for each uplink carrier and generates corresponding TPC commands. This closed-loop feedback system ensures that power control decisions are based on actual channel conditions and transmission performance, maintaining reliability across multiple carriers.
Solution Approach 2:
The patent enables dynamic power control adjustment for each uplink carrier based on real-time channel conditions, transmission power requirements, and feedback from the UE. The power control parameters and TPC commands can be dynamically updated for each carrier, allowing the system to adapt to changing conditions while maintaining effective power management.
Data Source
AI summary
The described apparatus and methods may include a controller configured to determine power required for at least one of a plurality of carriers, and generate at least one of a plurality of power control commands for at least one of the plurality of carriers based on the determination.