Power Control for Frequency Range Switching With Lower Signaling Overhead
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently switching bandwidth parts without increasing signaling overhead and decreasing spectral efficiency, particularly in managing different quality of service requirements and channel conditions.
Innovation Solution
Implement closed-loop power control (CL-CP) processes that adapt to changes in channel conditions and beam directions, resetting power control parameters based on beam switching and numerology changes to maintain optimal transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed-loop power control is continuously adjusted to adapt to channel conditions, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The system pre-configures multiple power control processes with different numerologies before channel conditions change. When channel conditions deteriorate or bandwidth part switching occurs, the wireless device can immediately switch to a pre-configured power control process without requiring real-time signaling for reconfiguration, thus maintaining reliability while reducing signaling overhead.
Solution Approach 2:
The patent implements dynamic selection of power control processes based on current channel conditions and bandwidth part usage. The wireless device monitors channel quality and autonomously switches between pre-configured power control processes with different numerologies, enabling adaptive response to changing conditions without continuous network signaling.
2Adaptability or versatility
If bandwidth part switching is implemented to satisfy different QoS requirements, then service adaptability is improved, but spectral efficiency decreases
Solution Approach 1:
The system segments the power control configuration into multiple independent power control processes, each associated with specific numerologies and bandwidth parts. This segmentation allows the wireless device to activate only the necessary power control process for the current service requirement, avoiding the overhead of reconfiguring a single comprehensive power control process and thereby maintaining spectral efficiency.
Solution Approach 2:
Different power control processes are configured with different numerologies (subcarrier spacing, cyclic prefix length) to match different service requirements. When switching bandwidth parts, the system changes the numerology parameters of the active power control process to optimize performance for the new bandwidth part while maintaining efficient spectral usage.
3Stability of the object's composition
If power control parameters are reset frequently to account for beam changes, then link stability is improved, but system complexity increases
Solution Approach 1:
Multiple power control processes are pre-configured with different numerologies and beam-specific parameters before beam switching occurs. When beam changes are detected, the wireless device switches to a pre-configured power control process that is already optimized for the new beam conditions, maintaining link stability without requiring complex real-time parameter recalculation or frequent resets.
Solution Approach 2:
The system creates copies of power control configurations for different beams and numerologies. Instead of modifying a single power control process when beam conditions change, the system switches between copied configurations that are already adapted to specific beam conditions, simplifying the management of beam-specific parameters and reducing system complexity.
Data Source
AI summary
A base station transmits, to a wireless device, a control message indicating to switch from a first frequency range for a cell to a second frequency range for the cell. The base station receives, from the wireless device via the second frequency range, at least one uplink signal. A value of a power control parameter used for a transmission power of the at least one uplink signal is maintained based on the second frequency range overlapping with the first frequency range.