PUSCH Transmit Power Control Using CSI-1 Bit Rate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The precision of calculating transmit power for the physical uplink shared channel (PUSCH) is low due to imprecise determination of bit rate, leading to inaccurate power adjustments in existing protocols.
Innovation Solution
A method for determining transmit power based on the first bit rate of channel state information part 1 (CSI-1), which involves calculating the first code modulation symbol quantity and adjusting transmit power accordingly, using various methods to account for code modulation symbols of CSI-1 and potential ACK/NACK symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the existing protocol's calculation manner of BPRE is used, then the process is simple, but the precision of transmit power determination is low
Solution Approach 1:
The patent segments the bit rate calculation into distinct components: determining the first code modulation symbol quantity for CSI-1, determining the second code modulation symbol quantity for HARQ-ACK, and calculating the total bit rate by combining these segments. This segmentation allows for more precise calculation of transmit power by accurately accounting for each component's contribution to the total bit rate, thereby resolving the contradiction between precision and complexity.
Solution Approach 2:
The patent applies preliminary action by determining the first code modulation symbol quantity for CSI-1 before calculating the total bit rate. This preliminary determination ensures that the CSI-1 contribution is accurately accounted for in advance, which improves the overall precision of transmit power determination without adding excessive complexity to the final calculation step.
2Ease of operation
If the first code modulation symbol quantity is determined based on the second code modulation symbol quantity, then the determination process is simplified, but the accuracy may be reduced
Solution Approach 1:
The patent changes the parameter relationship by introducing a proportional relationship between the first code modulation symbol quantity and the second code modulation symbol quantity, with a proportionality coefficient that reflects the actual resource allocation. This allows the system to maintain ease of operation through a simple calculation while preserving accuracy by using a calibrated proportionality factor that accounts for the specific characteristics of CSI-1 and HARQ-ACK resources.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
This application provides a method and an apparatus for determining transmit power. The method includes: A terminal device determines a first bit rate of channel state information part 1 CSI-1, where the first bit rate is a bit quantity of the CSI-1 carried on each resource element for transmitting the CSI-1; and the terminal device adjusts transmit power of a physical uplink shared channel PUSCH based on the first bit rate, where the PUSCH is used to carry the CSI-1. In embodiments of this application, the terminal device determines the transmit power of the PUSCH based on the first bit rate, where the first bit rate is the bit quantity of the CSI-1 carried on each resource element for transmitting the CSI-1. This helps improve accuracy of determining the transmit power of the PUSCH by the terminal device.