Interlace-Based PSFCH Power Control in Unlicensed Sidelink
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Solution Overview
Problem
The challenge of determining transmission power for interlace-based physical sidelink feedback channels (PSFCH) in sidelink over unlicensed spectrum (SL-U) systems is not adequately addressed in existing technologies.
Innovation Solution
A method for determining transmission power for interlace-based PSFCHs, including specific power control mechanisms for interlace-based PSFCHs in SL-U systems, ensuring compliance with regulatory requirements and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power for interlace-based PSFCH is not controlled, then signal coverage is maintained, but interference in unlicensed spectrum increases and spectral efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power based on multiple factors including pathloss, number of interlaces, and priority levels. The transmission power is calculated using a formula that incorporates these variables, allowing the system to optimize power consumption while maintaining reliable communication and reducing interference in unlicensed spectrum environments.
2Reliability
If transmission power is increased to ensure reliable feedback transmission, then communication reliability improves, but energy consumption increases and interference to other systems worsens
Solution Approach 1:
The patent implements parameter changes by introducing a priority-based power control mechanism where the transmission power is adjusted according to the priority of the feedback information and the number of interlaces allocated. This allows the system to transmit with higher power only when necessary for reliability, while reducing power consumption in scenarios with lower requirements.
Solution Approach 2:
The patent applies partial action by calculating transmission power based on the actual number of interlaces used rather than always using maximum power. The power control formula incorporates the interlace count as a variable, enabling the system to use only the necessary portion of available power resources for each transmission.
3Productivity
If power control mechanism is implemented for interlace-based PSFCH, then spectral efficiency and interference reduction improve, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously determine and adjust its transmission power without requiring complex centralized control. The device uses locally available information such as pathloss measurements, interlace allocation, and priority levels to calculate appropriate power levels, reducing the need for additional control infrastructure.
Solution Approach 2:
The patent manages complexity through parameter changes by using a standardized power control formula that incorporates readily available system parameters. The approach leverages existing network configuration information and terminal measurements to determine transmission power, avoiding the need for complex algorithms or additional signaling overhead.
Data Source
AI summary
A method for determining a transmission power and a terminal device are provided. The method includes that: a terminal device determines a transmission power of a first PSFCH, here, the first PSFCH is an interlace-based PSFCH.