PUSCH Power Control with Multi-TRP Offset Accumulation
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Solution Overview
Problem
In multi-TRP coordination transmission scenarios, existing power control methods fail to accurately determine transmit power for PUSCH due to independent scheduling by multiple TRPs, leading to inconsistent power management and potential interference or low SNR issues.
Innovation Solution
A power control method and apparatus that utilize CORESET pool indexes to associate power control processes with network devices, allowing for accumulation of power offsets from the same network device, ensuring consistent transmit power determination and improved uplink transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TRPs perform independent scheduling in any time sequence, then scheduling flexibility and resource utilization are improved, but transmit power determination accuracy deteriorates due to inability to accumulate power offsets from the same network device
Solution Approach 1:
The patent segments the power control process by introducing separate accumulation processes for different network devices (TRPs). Each TRP's power offsets are accumulated independently through dedicated power control processes, allowing multiple TRPs to schedule independently while maintaining accurate power determination for each device. This segmentation resolves the contradiction by enabling both scheduling flexibility and power accuracy simultaneously.
2Reliability
If power offsets from different TRPs are accumulated independently, then transmit power consistency with each TRP's indication is improved, but system complexity increases due to multiple power control processes
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple power control processes corresponding to different network devices before actual transmission occurs. Each power control process is pre-associated with a specific TRP, so when scheduling happens, the terminal can directly use the appropriate accumulation process without complex real-time decision-making. This reduces operational complexity while maintaining reliability.
3Device complexity
If a single power control process is used for multiple TRPs, then device complexity is reduced, but transmit power consistency with network device indications deteriorates
Solution Approach 1:
Each power control process serves itself by independently accumulating power offsets from its associated network device. The patent makes each power control process self-contained and autonomous, where process 1 accumulates offsets from TRP 1, process 2 accumulates offsets from TRP 2, and so on. This self-service approach ensures that each TRP's power indications are accurately reflected without requiring complex coordination between processes, thereby maintaining reliability while keeping each process relatively simple.
Data Source
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AI summary
A power control method and apparatus are disclosed, to improve accuracy of determining a transmit power by a terminal device in a multi-transmission reception point coordination transmission scenario. The method is applied to a terminal that has a capability of supporting being configured 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 sent by a network device (S501), where the first physical downlink control channel carries a power offset corresponding to a physical downlink control channel; determining a transmit power based on a power control process corresponding to the network device (S502), where the power control process is for accumulating power offsets indicated by the network device, and determining the transmit power for the physical downlink control channel based on an accumulation result; and sending the physical downlink control channel to the network device at the transmit power (S503). The power offsets from the same network device are independently accumulated, so that the transmit power for the PUSCH can be consistent with an indication from the network device.