PUSCH Power Control via Multiple TPMIs
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Solution Overview
Problem
Existing communication methods for physical uplink shared channels (PUSCH) in network devices fail to adapt to varying channel conditions, leading to suboptimal transmission performance due to the use of a single set of power control parameters and precoding matrices across different transmission links.
Innovation Solution
A communication method where a terminal device determines power control parameters based on precoding indication information, using multiple transmitted precoding matrix indicators (TPMIs) to adapt to different transmission paths, thereby improving transmission performance by employing specific power control parameters for each TPMI, and reducing redundancy in indicating TPMIs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a same PUSCH uses one set of power control parameters and one precoding matrix, then device complexity is reduced, but transmission performance deteriorates due to inability to adapt to channel conditions of different transmission links
Solution Approach 1:
The patent segments the single set of power control parameters into multiple sets, where each set corresponds to a specific transmission link or channel condition. This allows the terminal device to select appropriate power control parameters for each transmission link, improving transmission reliability without significantly increasing device complexity through structured parameter management.
Solution Approach 2:
The patent introduces dynamic selection of power control parameters based on channel conditions and transmission links. The terminal device dynamically chooses from multiple sets of power control parameters according to the specific transmission scenario, enabling adaptation to varying channel conditions while maintaining manageable complexity through predefined parameter sets.
2Reliability
If multiple sets of power control parameters are used for different transmission links, then transmission performance is improved through adaptation to channel conditions, but device complexity increases due to managing multiple parameter sets
Solution Approach 1:
The patent applies local quality by assigning different power control parameters to different transmission links or channel conditions. Each set of power control parameters is optimized for its specific transmission scenario, allowing localized optimization without requiring the entire system to manage all parameter sets simultaneously, thus balancing reliability improvement with complexity management.
Solution Approach 2:
The patent utilizes parameter changes by providing multiple sets of power control parameters with different configurations. The terminal device selects and switches between these parameter sets based on channel conditions and transmission requirements, achieving adaptation to varying scenarios while the network device controls the complexity through coordinated parameter indication.
3Adaptability or versatility
If precoding indication information indicates multiple TPMIs, then adaptability to different transmission paths is improved, but overhead for indicating precoding information increases
Solution Approach 1:
The patent merges the indication of multiple TPMIs into a unified precoding indication information structure. Instead of separately indicating each TPMI, the network device combines multiple TPMI indications into a single signaling message, reducing the overhead for indicating precoding information while maintaining the ability to specify multiple transmission paths and their corresponding parameters.
Data Source
AI summary
This application provides a communication method, apparatus, and system, to improve transmission performance in a communication process. The method includes: A terminal device determines a power control parameter of a PUSCH based on precoding indication information used by the PUSCH, where the precoding indication information includes n TPMIs, each TPMI corresponds to a set of power control parameters, at least two of the n TPMIs respectively correspond to different power control parameters, and each TPMI corresponds to some time-frequency resources occupied by the PUSCH, where n is a positive integer. The terminal device sends the PUSCH based on the power control parameter.