Uplink Power Control via SRI Segmentation in NR Terminals
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Solution Overview
Problem
In New Radio (NR) communication, determining the transmit power for uplink data sent via multiple beams by a terminal device is challenging, as the power control parameter is often beam-specific and indicated through Sounding Reference Signal (SRS) Resource Indication (SRI) in Downlink Control Information (DCI) scheduling data.
Innovation Solution
A data transmission method where a terminal device acquires multiple SRIs from DCI scheduling uplink data, determines a target SRI, and calculates the transmit power using corresponding power control parameters, thereby accurately determining the transmit power for uplink data to improve data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal device simultaneously sends uplink data via multiple beams, then data transmission efficiency is improved, but determining the transmit power becomes complex and uncertain
Solution Approach 1:
The patent segments the power control process by associating each SRI with specific power control parameters. When multiple SRIs are indicated, the terminal device segments the power determination into multiple parts, each corresponding to a specific SRI and its associated power control parameters, making the overall complex process manageable and deterministic
Solution Approach 2:
The patent applies preliminary action by pre-configuring power control parameters for each SRI before actual data transmission. The terminal device acquires multiple SRIs and their corresponding power control parameters in advance from DCI, so that when multiple beams need to be used, the power for each beam is already determined based on pre-acquired parameters
2Measurement precision
If beam-specific power control parameters are adopted for different beams, then transmit power accuracy is improved, but the complexity of power control increases when multiple beams are used
Solution Approach 1:
The patent applies local quality by assigning different power control parameters to different SRIs, allowing each beam to have its own optimized power control settings. This enables precise power control for each individual beam while maintaining a systematic approach through the SRI-based association mechanism
Data Source
AI summary
Provided are a data transmission method, a terminal device and a network device. The method comprises: a terminal device acquires a plurality of sounding reference signal resource indications (SRIs) from downlink control information (DCI) for scheduling uplink data, each SRI among the plurality of SRIs corresponding to at least one power control parameter; the terminal device determines a target SRI among the plurality of SRIs; the terminal device determines a power control parameter of the uplink data according to the at least one power control parameter corresponding to the target SRI; and the terminal device determines the transmit power of the uplink data according to the power control parameter of the uplink data. According to the embodiments of the present invention, the terminal device may determine a target SRI among a plurality of SRIs and accurately determine the transmit power of uplink data according to at least one power control parameter corresponding to the target SR, thereby improving data transmission efficiency.