Multi-Panel Uplink Power Control via Segmented PHR Reporting
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Solution Overview
Problem
The existing uplink power control mechanisms in wireless communication systems, particularly in multi-panel scenarios of the 5G NR system, face challenges in efficiently managing power control parameters and reporting mechanisms, such as PHR, due to the absence of Common Reference Signals and the introduction of beam management mechanisms, which affect transmission performance.
Innovation Solution
A method is introduced where a node receives and transmits information sets indicating reference signal resources, including power differences calculated from target and actual power values, to report power headroom values for both single-panel and multi-panel transmissions, allowing for dynamic power allocation and improved power control efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple Panels are configured on the terminal side to transmit on two transmitting beams simultaneously, then spatial diversity gain is improved, but the complexity of power control parameter management and reporting increases
Solution Approach 1:
The patent segments the power headroom reporting by introducing separate PHR fields for single-panel and multi-panel scenarios. The terminal device reports power headroom information separately for different panel configurations, allowing the network to manage power control parameters independently for each scenario without interference, thus reducing overall control complexity while maintaining spatial diversity benefits
Solution Approach 2:
The patent adds a new dimension to power headroom reporting by introducing a panel-specific indicator that distinguishes between single-panel and multi-panel transmission scenarios. This additional dimension allows the system to track and manage power control parameters for different panel configurations simultaneously, resolving the complexity issue while preserving the reliability gains from multi-panel operation
2Productivity
If dynamic allocation of power between two Panels is implemented, then transmission performance is improved, but the complexity of the reporting mechanism increases
Solution Approach 1:
The patent implements dynamic power allocation by allowing the terminal to report different power headroom values for single-panel and multi-panel scenarios based on current transmission conditions. The network can dynamically adjust power distribution between panels by interpreting the separate PHR reports, achieving optimal transmission performance while keeping the reporting mechanism structured and manageable through clear field definitions
Solution Approach 2:
The patent establishes a feedback mechanism where the terminal reports power headroom information for different panel configurations, and the network uses this feedback to dynamically allocate power between panels. The separate PHR fields provide targeted feedback for each scenario, enabling precise power control adjustments without overwhelming the reporting mechanism with undifferentiated data
3Measurement precision
If separate power control parameters are used for single-panel and multi-panel transmissions, then power control accuracy is improved, but the quantity of information to be reported increases
Solution Approach 1:
The patent merges the power headroom reporting for single-panel and multi-panel scenarios into a unified PHR message structure. By combining both reports in a single transmission with clearly defined fields, the system achieves accurate power control for both scenarios while avoiding the overhead of separate reporting messages, thus balancing precision with information efficiency
Data Source
AI summary
The node firstly receives a first information set, the first information set indicating a first reference signal resource set; and then transmits a second information set; the second information set includes a first power difference and a second power difference; the first power difference is equal to a difference obtained by subtracting a first target power value from a first power value, and the second power difference is equal to a difference obtained by subtracting a second target power value from a second power value; the first target power value and the second target power value are both associated to a first reference signal resource in the first reference signal resource set; the first target power value and the second target power value are for a same cell. This application improves uplink power control under multi-panel terminals to increase system flexibility.