PUCCH Repetition Power Control for Multi-Beam, Multi-TRP Uplink Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 3GPP NR system lacks specific details on improving the reliability and robustness of uplink transmissions using multiple beam links between user equipment (UE) and a base station (BS), particularly for physical uplink control channel (PUCCH) repetitions with one or more beams or multiple transmit-receive points (TRPs).
Innovation Solution
A method and apparatus for wireless communications that involve configuring multiple power control parameter sets for PUCCH repetitions, determining power for each repetition based on a mapping relationship, and transmitting these repetitions using enhanced DCI formats to manage power control across different beam and TRP links, even when spatial relation information is not available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple power control parameter sets are configured for PUCCH repetitions with multiple beams/TRPs, then the reliability and robustness of uplink transmissions is improved, but the device complexity and configuration overhead increases
Solution Approach 1:
The patent divides the power control configuration into multiple separate parameter sets, each associated with a specific beam or TRP. This segmentation allows independent optimization of power control for each transmission link, improving reliability without requiring a single complex unified configuration. Each parameter set can be independently managed and applied to corresponding PUCCH repetitions.
Solution Approach 2:
The patent applies different power control parameter sets to different PUCCH repetitions based on their associated beams or TRPs. This local quality approach ensures that each repetition uses optimized parameters tailored to its specific transmission path, thereby improving overall reliability while maintaining manageable complexity through localized rather than global optimization.
2Reliability
If power control is optimized for each PUCCH repetition with mapping to specific power control parameter sets, then the transmission robustness in varying link qualities is improved, but the processing complexity at the UE increases
Solution Approach 1:
The patent pre-configures multiple power control parameter sets and establishes mapping relationships between PUCCH repetitions and these parameter sets before actual transmission. This preliminary action allows the UE to simply apply pre-determined parameters based on the mapping, reducing real-time processing complexity while maintaining optimized power control for each repetition's specific link conditions.
Solution Approach 2:
The patent changes power control parameters dynamically by selecting different parameter sets for different PUCCH repetitions based on their association with specific beams or TRPs. This parameter change approach enables adaptation to varying link qualities without requiring complex real-time calculations, as the parameter selection follows pre-established mapping rules.
3Reliability
If multiple beams and TRPs are used for PUCCH repetitions, then the coverage and reliability in high-frequency bands are improved, but the power control management complexity increases
Solution Approach 1:
The patent creates a universal power control framework where multiple parameter sets can be applied across multiple beams and TRPs through a standardized mapping mechanism. This multi-functionality approach allows the same power control structure to serve multiple transmission paths, improving coverage and reliability in high-frequency bands while managing complexity through a unified management approach rather than separate mechanisms for each beam or TRP.
Data Source
AI summary
Embodiments of the present disclosure are related to a method and apparatus for power control of a physical uplink control channel (PUCCH) repetition of a PUCCH transmission with one or more beams or multiple transmit-receive points (TRPs). A method according to an embodiment of the present disclosure includes: receiving configuration information regarding a plurality of PUCCH repetitions of a PUCCH transmission, wherein the configuration information includes a plurality of power control parameter sets corresponding to the plurality of PUCCH repetitions; determining power for each PUCCH repetition of the plurality of PUCCH repetitions according to the configuration information and a mapping relationship between the each PUCCH repetition and a power control parameter set of the plurality of power control parameter sets; and transmitting, by using the determined power for the each PUCCH repetition, the each PUCCH repetition in a time interval of a plurality of time intervals.