UE Transmit Power Adjustment for URLLC Latency
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving lower latency and higher reliability, particularly in ultra-reliable low-latency communications (URLLC), due to delays incurred by feedback loops in mechanisms for interference management and power control, which can cause packets to miss deadlines and expire.
Innovation Solution
The method involves a user equipment (UE) adjusting its transmit power based on parameters such as the packet deadline, whether the transmission is new or a retransmission, and the type of power control being used, without requiring explicit power adjustment commands from the base station, to improve the likelihood of successful packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback loops are used for interference management and power control, then reliability is improved, but latency increases causing packets to miss deadlines
Solution Approach 1:
The system pre-configures power adjustment parameters and thresholds before transmission occurs. The base station provides power control configurations including threshold values and adjustment parameters in advance, allowing the UE to autonomously adjust power without waiting for feedback loops, thus reducing latency while maintaining reliability control
Solution Approach 2:
The UE autonomously adjusts its transmit power based on pre-configured parameters and local measurements without requiring continuous base station commands. The device serves itself by comparing measured signal quality against thresholds and automatically adjusting power, eliminating the need for slow feedback loops while maintaining reliable communication
2Measurement precision
If explicit power adjustment commands are used from base station, then power control accuracy is improved, but control signaling overhead and latency increase
Solution Approach 1:
The UE autonomously determines power adjustments by comparing measured reference signal received power against pre-configured thresholds and applying predetermined adjustment parameters. This self-service mechanism eliminates the need for continuous explicit commands from the base station, reducing control signaling overhead and latency while maintaining accurate power control through pre-configured parameters
Solution Approach 2:
The system implements a simplified feedback mechanism where the base station provides power control configurations and thresholds, and the UE provides implicit feedback through autonomous power adjustments. This reduces the need for continuous explicit power control commands while maintaining accurate power management through the configured feedback parameters
Data Source
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AI summary
Various aspects described herein relate to controlling transmit power in wireless communications. It can be determined, at a user equipment (UE), that communications with a base station are configured over a connection associated with a threshold reliability. Based at least in part on this determination, a configured transmit power can be adjusted to an adjusted transmit power for a transmission attempt over the connection. Data can then be transmitted at the adjusted transmit power.