Uplink Power Control Configuration for Low Latency Wireless
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing power control for low latency and high reliability communications, particularly in scenarios like industrial IoT, where strict latency and reliability standards must be met to ensure successful device communications.
Innovation Solution
The proposed solution involves a user equipment (UE) selecting a power control configuration based on parameters such as default transmission powers, path loss measurements at the physical layer, and separate step sizes for transmission power adjustments, allowing for optimized transmit power settings for low latency or high reliability communications, including those with multiple transmission reception points (TRPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power control configurations are implemented for low latency and high reliability communications, then communication reliability and latency performance are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments power control configurations into distinct sets for different communication requirements. Specifically, it implements separate power control parameter sets (including transmit power, step sizes, and path loss compensation factors) for low latency communications versus high reliability communications, allowing each to be optimized independently without interfering with the other.
Solution Approach 2:
The patent introduces dynamic selection mechanisms that allow the UE to switch between different power control configurations based on current communication requirements. The system dynamically adjusts which power control parameter set is active depending on whether the current transmission prioritizes latency or reliability, enabling adaptive optimization without permanent structural complexity.
2Reliability
If separate power control configurations are implemented for low latency and high reliability communications, then communication reliability and latency performance are improved, but signaling overhead increases
Solution Approach 1:
The patent creates a universal power control configuration framework that serves multiple communication types through a single unified structure. By defining a master configuration that contains all possible power control parameters and using selection indicators to activate specific subsets, the system achieves multi-functionality without requiring separate signaling channels for each configuration type.
Solution Approach 2:
The patent performs preliminary configuration by pre-defining all power control parameters in a comprehensive configuration set before actual communication begins. The network node prepares multiple power control parameter sets in advance (including those for low latency and high reliability scenarios) and stores them for quick selection, eliminating the need for real-time negotiation and reducing signaling overhead during active communication.
3Speed
If physical layer path loss measurements are used for transmit power determination, then transmission speed and responsiveness are improved, but measurement precision and reliability may be affected
Solution Approach 1:
The patent adjusts path loss measurement parameters dynamically based on communication requirements. For low latency communications, it uses physical layer measurements with shorter averaging periods and smaller bandwidths to achieve faster responsiveness. For high reliability communications, it switches to more precise measurements with longer averaging periods and larger bandwidths, optimizing the trade-off between speed and precision for each scenario.
Solution Approach 2:
The patent implements dynamic measurement strategies where the UE switches between different path loss measurement approaches depending on the active power control configuration. The system dynamically selects between physical layer measurements (faster but less precise) and higher layer measurements (slower but more precise) based on whether latency or reliability is the current priority.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described for uplink power control. A user equipment (UE) in communication with a base station may select a power control configuration for low latency or high reliability communications or semi-persistently scheduled communications. In some cases, a power control configuration may correspond to a reception point in a multi-reception-point environment. In some cases, the power control configuration may indicate a default transmit power for uplink communications. In some cases, a UE may perform, at the physical layer, measurements on a signal received from the base station and use this information to determine or select a transmit power for uplink communications. Selecting the low latency power control configuration may include selecting a set of transmit powers or a step size for transmit power adjustments specific to low latency or high reliability communications or semi-persistently scheduled communications.