Terminal Power Reporting for Accurate Joint Channel Estimation
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Solution Overview
Problem
The uplink signal quality from terminal devices to base stations is poor due to lower transmit power and high frequency attenuation, leading to inaccurate channel estimation and poor coverage.
Innovation Solution
A power control method where terminal devices report first indication information to network devices about transmit power phases and intervals to avoid phase jumps, allowing network devices to adjust transmit power accordingly and perform accurate joint channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device increases transmit power to improve uplink signal quality, then the signal quality improves, but phase jumps occur causing joint channel estimation to become inaccurate
Solution Approach 1:
The terminal device performs preliminary action by reporting first indication information about power jump points to the network device before actual power adjustments occur. This allows the network device to anticipate phase jumps and adjust its joint channel estimation strategy accordingly, preventing estimation inaccuracies caused by unexpected phase transitions when transmit power is increased
Solution Approach 2:
The terminal device provides feedback to the network device through the first indication information, which contains details about power jump points and phase behavior. The network device uses this feedback to determine whether to perform joint channel estimation across slots with power changes, creating a closed-loop system that maintains estimation accuracy while allowing transmit power adjustments for improved uplink signal quality
2Measurement precision
If the network device performs joint channel estimation to improve channel estimation accuracy, then channel estimation accuracy improves, but phase jumps from power adjustments cause joint channel estimation to fail
Solution Approach 1:
The network device performs preliminary action by determining in advance whether to perform joint channel estimation based on received first indication information about upcoming power jump points. By proactively identifying slots where phase jumps will occur, the network device can avoid performing joint channel estimation across these slots, preventing estimation failure while still performing accurate estimation in slots where power remains stable
Solution Approach 2:
The first indication information serves as feedback that enables the network device to adapt its joint channel estimation strategy. The network device uses this information to make informed decisions about whether to perform joint channel estimation, ensuring high reliability by avoiding estimation attempts that would fail due to phase jumps, while maintaining high accuracy by performing estimation only when conditions are favorable
3Measurement precision
If the terminal device reports detailed power information to avoid phase jumps, then joint channel estimation accuracy improves, but signaling overhead increases
Solution Approach 1:
The terminal device extracts and reports only the essential first indication information related to power jump points and phase behavior, rather than reporting all possible power-related parameters. This selective extraction provides the network device with sufficient information to make accurate joint channel estimation decisions while minimizing the amount of signaling data transmitted, thus reducing signaling overhead while maintaining estimation accuracy
Data Source
AI summary
The application discloses a method including: determining, by a terminal device, first indication information, wherein the first indication information is used to indicate one or more first transmit powers of the terminal device, and the first transmit power is a transmit power corresponding to a phase jump of an uplink signal of the terminal device; and sending, by the terminal device, the first indication information to a network device.