Wireless Transmission Power Control via Activated Reference Signals
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining and adjusting transmission powers for uplink signals, particularly in the absence of explicit reference signals, leading to inefficiencies and potential interference.
Innovation Solution
A wireless device uses a reference signal activated by a base station for transmission power determination, with an indicated beam information message, or defaults to a parameter like a power control parameter set index to determine the reference signal when no indication is provided.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless device determines transmission power without an explicit reference signal indication, then the device can operate with simpler procedures, but the transmission power accuracy deteriorates leading to interference and inefficiencies
Solution Approach 1:
The base station pre-configures multiple reference signals with different spatial relations and power control parameters before the wireless device needs to determine transmission power. When beam information is updated, the base station activates the appropriate pre-configured reference signal through indication, allowing the device to quickly determine accurate transmission power without complex real-time calculations.
2Measurement precision
If the base station provides explicit reference signal indication in beam information messages, then the transmission power control accuracy is improved, but the message complexity and signaling overhead increase
Solution Approach 1:
The patent introduces an activation indication mechanism where the base station sends a compact indicator (such as a reference signal index or activation flag) in the beam information message, rather than transmitting complete power control parameters. This intermediary indication points to pre-configured reference signals, reducing message complexity while maintaining the ability to provide accurate transmission power control.
3Adaptability or versatility
If multiple reference signals are configured for different beams, then the adaptability of power control is improved, but the difficulty of determining the correct reference signal increases
Solution Approach 1:
The base station provides feedback in the form of beam information messages that indicate which pre-configured reference signal should be activated for the current transmission. This feedback mechanism guides the wireless device to correctly identify and use the appropriate reference signal among multiple configured options, resolving the difficulty of selection while maintaining adaptability to different beam conditions.
Data Source
AI summary
Wireless communications may be used to support transmission power control. A message to schedule a transmission may be received without indicating a parameter for determining a power for the transmission. The transmission power may be determined based on a pathloss reference signal associated with a lowest index of a power control parameter set.