Multi-Panel Power Headroom Reporting for M-TRP Scheduling
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Solution Overview
Problem
Existing methods struggle to determine and report power headroom (PH) effectively during simultaneous multi-panel uplink transmission for multiple transmission and reception points (M-TRPs) in communication systems.
Innovation Solution
A power headroom (PH) reporting method that calculates and reports multiple PH values for each panel based on their respective transmission powers and maximum transmission powers, allowing network devices to flexibly schedule resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PH values are calculated and reported for simultaneous multi-panel uplink transmission, then resource scheduling flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the PH reporting by dividing it into multiple PH values corresponding to different panels and/or TRPs. Each PH value represents the power headroom for a specific panel-TRP combination, allowing the network to schedule resources for each segment independently. This segmentation enables fine-grained resource allocation while maintaining manageable signaling through selective reporting based on configuration.
Solution Approach 2:
The patent introduces an additional dimension to PH reporting by incorporating panel identifiers and TRP identifiers into the reporting structure. Instead of a single scalar PH value, the system reports PH values across multiple dimensions (panel dimension, TRP dimension), enabling the network to understand power headroom in a multi-dimensional space for more flexible resource scheduling.
2Measurement precision
If PH is calculated based on sum of transmission powers across panels, then resource scheduling accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent segments the power calculation into two approaches: (1) calculating PH for each panel independently based on its own transmission power, and (2) calculating PH based on the sum of transmission powers across panels. The network can configure which approach to use, allowing accurate power accounting without forcing complex calculations in all scenarios.
Solution Approach 2:
The patent implements partial action by allowing the UE to report PH values selectively based on configuration. Instead of always calculating and reporting all possible PH values (excessive action), the system calculates and reports only the necessary PH values based on the configured reporting mode, reducing calculation overhead while maintaining scheduling accuracy.
Data Source
AI summary
A power headroom (PH) reporting method and a related apparatus are disclosed in the disclosure. The method is applied to a terminal device having two panels, where the two panels are capable of simultaneous uplink transmission in a first time unit, and the uplink transmission of any one of the two panels in the first time unit is intended for a first transmission and reception point (TRP) and/or a second TRP. The method includes the following. A first PH is calculated according to a first transmission power and a maximum transmission power of the terminal device, and a second PH is calculated according to the maximum transmission power and a second transmission power. Control signaling that contains the first PH and the second PH is sent. With this disclosure, a PH can be determined and reported for the case of simultaneous multi-panel uplink transmission for multiple TRPs (M-TRPs), so that a network device can flexibly schedule resources.