CORESET Pool Power Control for Accurate Multi-TRP PUSCH
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Solution Overview
Problem
In a multi-transmission reception point (TRP) coordination scenario, existing power control methods for physical uplink shared channels (PUSCH) fail to accurately determine transmit power due to independent scheduling by multiple TRPs, leading to inconsistent power management and potential interference.
Innovation Solution
A power control method and apparatus that utilizes a power control process associated with CORESET pools to accumulate power offsets from the same network device, ensuring consistent transmit power determination by accumulating power offsets from the same TRP, and optionally using SRI indicators for further accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TRPs perform independent scheduling in any time sequence, then scheduling flexibility is improved, but transmit power determination accuracy deteriorates
Solution Approach 1:
The patent segments the power control process by introducing separate power control process indicators for different TRPs. Each TRP's power offsets are accumulated independently through separate power control processes, allowing multiple TRPs to perform independent scheduling while maintaining accurate transmit power determination for each TRP's contributions.
2Measurement precision
If power offsets from multiple TRPs are accumulated independently, then transmit power accuracy for each TRP is improved, but system complexity increases
Solution Approach 1:
The patent uses a universal power control process indicator that can identify different power control processes. This indicator serves multiple functions: it distinguishes between different TRPs, accumulates power offsets for each TRP separately, and enables the terminal to determine transmit power accurately without requiring entirely separate control mechanisms for each TRP.
3Reliability
If the terminal accumulates power offsets from the same network device, then uplink transmission reliability is improved, but the complexity of power control management increases
Solution Approach 1:
The patent implements feedback mechanisms where the network device provides power control process indicator information to the terminal. This feedback enables the terminal to correctly identify and accumulate power offsets from the same network device, improving uplink transmission reliability while the network device manages the complexity of coordinating multiple TRP power control processes.
Data Source
AI summary
A power control method and apparatus are disclosed. The method is applied to a terminal that has a capability of supporting a configuration with a plurality of control resource set pool indexes and/or that is configured with the plurality of control resource set pool indexes. The method includes receiving a first physical downlink control channel (PDCCH) sent by a network device, where the first PDCCH carries a power offset corresponding to a physical uplink shared channel (PUSCH). The method further includes determining a transmit power based on a power control process corresponding to the network device, where the power control process is used for accumulating power offsets indicated by the network device, and determining the transmit power for the PUSCH based on an accumulation result. The method further includes sending the PDCCH to the network device at the transmit power.