Closed-Loop Uplink Power Control for Half- and Full-Duplex Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in managing cross-link interference and self-interference in full duplex (FD) and half duplex (HD) operations due to the lack of differentiated power control mechanisms, leading to inefficient uplink power adjustments.
Innovation Solution
Implementing separate closed loop full duplex (FD) and half duplex (HD) transmit power control (TPC) commands, where the network entity configures different power control states for FD and HD, and the user equipment (UE) applies these commands based on the type of TPC command indicated in the downlink control information (DCI).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate FD and HD TPC commands are implemented, then power control precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the TPC command into two distinct types: FD TPC commands for full duplex operations and HD TPC commands for half duplex operations. Each command type is carried in separate DCI formats or identified through specific fields, allowing the UE to apply different power control parameters based on the duplex mode. This segmentation enables precise power control for each operation type while maintaining manageable complexity through standardized command structures.
2Productivity
If FD and HD power control states are differentiated, then communication efficiency is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent uses distinct identification mechanisms analogous to color coding to differentiate between FD and HD TPC commands. This is achieved through separate DCI formats, different RNTI scrambling, or specific indicator fields within the DCI that clearly mark the command type. The UE can efficiently detect and measure the command type through these explicit indicators without complex analysis, while still achieving differentiated power control for optimized communication efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit uplink communications to a network entity using a set of open loop and closed loop power control parameters. Open loop parameters may be configured in radio resource control. Closed loop parameters may be indicated in uplink scheduling information (e.g., a transmit power control (TPC) field in scheduling downlink control information (DCI)) or in a DCI format dedicated for providing TPC commands. The network may configure different closed loop power control states for half duplex (HD) and full duplex (FD), and the UE may apply a TPC command to an HD or FD closed loop power control state based on whether the TPC command is an HD type TPC command or an FD type TPC command. DCI may indicate whether an included TPC command is an HD type TPC command or an FD type TPC command.