Terminal Device Power Control via Closed Loop Reset
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Solution Overview
Problem
In New Radio (NR) systems, accurately controlling the transmit power of Physical Uplink Shared Channel (PUSCH) across multiple panels with different channel conditions is challenging due to varying transmission parameters, requiring distinct Sounding Reference Signal (SRS) resources and power control parameters, which complicates power control accuracy when these parameters are reconfigured.
Innovation Solution
A method where a terminal device resets the closed loop adjustment factor associated with SRI information when the open loop power control parameter or downlink Reference Signal (RS) is reconfigured, allowing for re-performed closed loop accumulation adjustments to improve power control accuracy, and involves configuring SRI information within Downlink Control Information (DCI) and high-layer signaling to manage open loop power control parameters and indexes of downlink RSs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple panels with different channel conditions are used for uplink transmission, then transmission capability is improved, but power control accuracy deteriorates when parameters are reconfigured
Solution Approach 1:
The patent applies dynamics by making the closed loop adjustment factor configurable and adjustable based on panel identification. The system transitions from a static power control mechanism to a dynamic one that adapts to different panels and their respective channel conditions, allowing the adjustment factor to be updated according to current transmission requirements while maintaining accuracy across multiple panels
Solution Approach 2:
The patent implements local quality by assigning panel-specific closed loop adjustment factors tailored to each panel's unique channel conditions. Instead of using a universal adjustment factor for all panels, the system configures individual adjustment factors (e.g., first closed loop adjustment factor for first panel, second closed loop adjustment factor for second panel) that optimize power control for each specific panel's characteristics
2Reliability
If different SRS resources are configured for different panels, then transmission parameters are optimized, but system complexity increases
Solution Approach 1:
The patent applies universality by creating a unified power control mechanism that handles multiple panels through a single configurable adjustment factor framework. Rather than requiring completely separate power control systems for each panel, the invention provides a universal approach where the same basic mechanism (closed loop adjustment) is applied across all panels, with each panel simply needing its own identification and corresponding adjustment factor configuration
Solution Approach 2:
The patent implements segmentation by dividing the power control adjustment into panel-specific segments while maintaining an overall unified structure. Each panel gets its own identification and adjustment factor, but these segmented adjustments operate within a common power control framework that processes all panels systematically, reducing the complexity burden of managing completely independent control systems
Data Source
AI summary
A power control method, a terminal device and a network device are provided. The method includes: a terminal device resets a first closed loop adjustment factor associated with first Sounding Reference Signal Resource Indicator (SRI) information in condition that a first open loop power control parameter associated with the first SRI information or a first downlink Reference Signal (RS) associated with the first SRI information is reconfigured, the first open loop power control parameter being configured for power control of a Physical Uplink Shared Channel (PUSCH) and the first downlink RS being configured to measure a path loss value for power control of over the PUSCH; and the terminal device determines transmit power of the PUSCH according to the reset first closed loop adjustment factor.