Multi-Panel Uplink Power Control for M-DCI Scheduling
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Solution Overview
Problem
The challenge in 3GPP R18 is to effectively control uplink power for simultaneous transmissions from multiple antenna panels of a terminal device to multiple TRPs, particularly in scenarios involving multi-panel and multi-DCI scheduling, to enhance transmission reliability and throughput.
Innovation Solution
A method and device for uplink power control that involves configuring maximum transmitting powers for each antenna panel based on received configuration information, allowing simultaneous uplink transmissions via multiple panels, with power control mechanisms adjusted for overlapping and non-overlapping resource allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simultaneous uplink transmissions via multiple antenna panels are implemented, then transmission reliability and throughput are improved, but power control complexity increases
Solution Approach 1:
The patent segments the uplink power control into panel-specific maximum transmitting powers (PCMAX,P) for each antenna panel. This segmentation allows independent power control for each panel while maintaining overall system reliability, resolving the contradiction by making the complex multi-panel power control manageable through modular panel-level control units.
Solution Approach 2:
The patent implements dynamic power control where the terminal device adjusts transmitting power based on real-time conditions including path loss measurements, closed-loop TPC commands, and panel-specific parameters. This dynamic adjustment mechanism enables the system to maintain high transmission reliability while adapting power control to current transmission conditions, reducing unnecessary complexity.
2Manufacturing precision
If panel-specific maximum transmitting powers are configured, then power allocation precision is improved, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by configuring panel-specific maximum transmitting powers (PCMAX,P) tailored to each antenna panel's characteristics and transmission conditions. Each panel receives customized power configuration based on its specific path loss, capability, and transmission requirements, achieving precise power allocation while the network device manages the configuration complexity centrally.
Solution Approach 2:
The patent utilizes parameter changes by introducing panel-specific identifiers (panelID) and panel-specific maximum power parameters (PCMAX,P) to the power control mechanism. These parameter changes enable precise differentiation and control of each panel's power allocation, achieving high precision while maintaining manageable configuration through standardized parameter extensions.
3Reliability
If path loss compensation is applied, then transmission reliability is improved, but power control accuracy may be reduced due to uplink-downlink asymmetry
Solution Approach 1:
The patent applies partial path loss compensation through the parameter α (alpha) which can be configured between 0 and 1. This allows the system to apply适度的 path loss compensation that maintains transmission reliability for distant panels while avoiding excessive power adjustments that would reduce accuracy in near panels, resolving the asymmetry issue through configurable compensation levels.
Solution Approach 2:
The patent implements closed-loop power control where the network device measures received signal quality and sends TPC (Transmit Power Control) commands back to the terminal device. This feedback mechanism corrects power control deviations caused by uplink-downlink asymmetry, maintaining both reliability through path loss compensation and accuracy through real-time network-side adjustments.
Data Source
AI summary
An uplink power control method includes: receiving, by a terminal device, configuration information of a maximum transmitting power sent by an access network device, the configuration information of the maximum transmitting power being configured to determine respective panel maximum transmitting powers PCMAX,P corresponding to uplink transmissions respectively performed by the terminal device via two antenna panels in a case of scheduling STxMP by M-DCI. The terminal device includes a plurality of antenna panels and supports simultaneous uplink transmissions via the plurality of antenna panels.