Multi-TRP Uplink Power Control for Interference Reduction
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Solution Overview
Problem
In mobile communication systems where multiple Transmission and Reception Points (TRPs) are configured for a terminal, determining the uplink transmission power for each TRP is a challenge, leading to interference and reduced channel capacity.
Innovation Solution
A power control method involving a network device sending indication information to a terminal to specify power control parameters for each TRP, using open and closed loop power control parameters, and utilizing Transmission Configuration Indication (TCI) states or parameter sets to manage uplink transmission power for each TRP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a network device configures multiple TRPs for a terminal to improve communication reliability and capacity, then communication reliability is improved, but determining the uplink transmission power for each TRP becomes complex and interference increases
Solution Approach 1:
The patent divides the power control parameters into separate sets for different TRPs. Each TRP has its own dedicated power control parameter set, allowing independent power control for each transmission point. This segmentation resolves the complexity by providing a structured method to manage multiple TRPs without requiring complex coordination between them.
Solution Approach 2:
The patent applies different power control parameters locally to each TRP based on its specific characteristics and channel conditions. Each TRP can have customized power control settings optimized for its local environment, which simplifies the overall power control mechanism while improving communication reliability through localized optimization.
2Measurement precision
If uplink transmission power is increased to improve signal quality, then signal quality is improved, but interference between TRPs increases and channel capacity is reduced
Solution Approach 1:
The patent changes the power control parameters independently for each TRP, allowing the system to optimize signal quality for each transmission point while preventing excessive power that would cause interference. By adjusting parameters such as path loss compensation factors and target received powers separately for each TRP, the system achieves good signal quality without generating harmful interference between TRPs.
Data Source
AI summary
A power control method includes: receiving indication information sent by a network device, in which the indication information indicates a power control parameter for an uplink transmission corresponding to each TRP among a plurality of transmission and reception points (TRPs).