Virtual Power Headroom Reporting for M-DCI Multi-TRP Control
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Solution Overview
Problem
Current wireless communication systems face challenges in determining virtual power headroom reports (PHRs) in multiple downlink control information (M-DCI) based multiple transmit-receive point (M-TRP) scenarios, as detailed methods for virtual PHR determination are lacking.
Innovation Solution
A UE is configured with a receiver to receive information about CORESET pool indices for an activated bandwidth part (BWP) of a serving cell and a transmitter to transmit virtual PHRs based on power control parameter sets associated with these indices. The power control parameter sets include pathloss reference signals (PL-RS) and other power control parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If virtual PHR determination methods are not established for M-DCI based M-TRP scenarios, then the system can maintain simplicity, but power control and scheduling accuracy deteriorates
Solution Approach 1:
The patent segments the power control parameter sets by associating them with different CORESET pool indices (first and second power control parameter sets corresponding to first and second CORESET pool indices respectively). This segmentation allows the UE to determine separate virtual PHRs for different TRPs, improving power control accuracy in M-TRP scenarios while maintaining manageable complexity through structured association rules.
Solution Approach 2:
The patent introduces CORESET pool index as an intermediary element to link downlink control information with uplink power control parameter sets. This intermediary mechanism enables the UE to correctly identify which power control parameters apply to which TRP, resolving the complexity of virtual PHR determination in multi-TRP scenarios without requiring complex calculation frameworks.
2Measurement precision
If multiple power control parameter sets are used for different CORESET pool indices, then virtual PHR determination accuracy improves, but UE processing complexity increases
Solution Approach 1:
The patent applies local quality by assigning different power control parameter sets to different CORESET pool indices. Each TRP has its own associated power control parameters (first power control parameter set for first CORESET pool index, second power control parameter set for second CORESET pool index), allowing accurate local power control for each TRP while the UE processing remains organized through clear index-based differentiation.
Solution Approach 2:
The patent utilizes parameter changes by switching between different power control parameter sets based on the active BWP configuration and CORESET pool index. The UE determines which parameter set to use by changing its focus between different parameter configurations, enabling accurate virtual PHR determination without requiring the UE to process all parameter sets simultaneously, thus managing processing complexity.
3Quantity of substance
If the UE transmits multiple virtual PHRs in a slot, then power control information completeness improves, but transmission time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the association between CORESET pool indices and power control parameter sets through downlink control information. This preliminary setup allows the UE to quickly determine which virtual PHRs need to be transmitted and which parameter sets to use, reducing the time required for PHR determination and transmission while ensuring complete power control information is provided.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for determining virtual power headroom report (PHR). According to an embodiment of the present disclosure, a user equipment (UE) can include: a receiver configured to receive configuration information indicating a first control resource set (CORESET) pool index and a second CORESET pool index for an activated bandwidth part (BWP) of a serving cell; a transmitter configured to transmit at least one virtual PHR in a slot, wherein the at least one virtual PHR is determined based on at least one of a first power control parameter set and a second power control parameter set for the activated BWP of the serving cell, wherein the first power control parameter set includes a first pathloss reference signal (PL-RS) and a first set of power control parameters except for PL-RS, and the second power control parameter set includes a second PL-RS and a second set of power control parameters except for PL-RS; and a processor coupled to the transmitter and the receiver.