Sidelink TPC Command Accumulation for Interference-Aware Power Control
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Solution Overview
Problem
Existing wireless communication systems, particularly in LTE and NR, face challenges in optimizing sidelink transmit power control (TPC) due to the lack of efficient methods for processing TPC commands, leading to interference and inefficiencies in peer-to-peer communications.
Innovation Solution
Implementing sidelink closed-loop TPC command processing techniques that involve accumulating TPC commands over a configured period, allowing UEs to determine optimal transmit power adjustments based on feedback from multiple receivers, thereby enhancing power control accuracy and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TPC commands are processed using existing methods in LTE and NR, then the system maintains basic functionality, but power control accuracy is insufficient and interference occurs in peer-to-peer communications
Solution Approach 1:
The patent segments the TPC command processing into distinct phases: accumulation phase where multiple TPC commands are collected over a configured period, and processing phase where the accumulated commands are evaluated. This segmentation allows the system to gather sufficient feedback information before making power adjustment decisions, improving accuracy while managing interference through structured processing intervals.
Solution Approach 2:
The patent implements preliminary accumulation of TPC commands before actual power control adjustments are applied. By pre-accumulating feedback from multiple receivers over a configured period, the system prepares optimized power control parameters in advance, ensuring that when adjustments are made, they are based on comprehensive feedback rather than instantaneous measurements, thereby reducing interference.
2Measurement precision
If TPC commands are accumulated over a configured period, then power control accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent employs periodic accumulation of TPC commands over configured periods, where the accumulation window is reset periodically based on triggering events such as new sidelink transmissions or configured grant occasions. This periodic structure simplifies processing by defining clear boundaries for accumulation and processing phases, making the increased complexity manageable through regular, predictable cycles rather than continuous complex operations.
Solution Approach 2:
The system performs preliminary accumulation of TPC commands during configured periods, preparing the data structure and feedback information in advance before actual power control decisions are made. This preliminary preparation separates the complex accumulation task from the decision-making process, allowing the system to gather and organize feedback information systematically, thereby managing processing complexity through staged operations.
3Reliability
If multiple TPC commands are accumulated and processed, then communication quality is improved, but time delay in power adjustment increases
Solution Approach 1:
The patent implements periodic accumulation with configurable periods that balance between gathering sufficient feedback for quality improvement and maintaining timely power adjustments. The accumulation period can be configured based on traffic patterns and quality requirements, allowing the system to optimize the trade-off between communication quality and adjustment speed by adjusting the accumulation window duration and triggering conditions.
Solution Approach 2:
The system accumulates TPC commands over configured periods, which may represent a partial accumulation rather than waiting for all possible feedback, or excessive accumulation when quality requirements demand it. This flexible approach allows the system to adjust the accumulation duration and command count based on specific communication quality requirements, achieving the necessary balance between quality improvement and time delay.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, during an accumulation period, a plurality of transmit power control (TPC) commands that are based at least in part on one or more sidelink communications transmitted by the UE. The UE may determine a transmit power adjustment for the UE based at least in part on the plurality of TPC commands. The UE may selectively adjust a transmit power of the UE based at least in part on the transmit power adjustment. Numerous other aspects are provided.