Joint Channel Estimation Duration for Reliable NTN Uplink Coverage
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Solution Overview
Problem
In Non-terrestrial Networks (NTN), the high mobility of satellites leads to challenges in maintaining power consistency and phase continuity for joint channel estimation, resulting in lower reliability of uplink coverage enhancement.
Innovation Solution
A method for determining a duration of joint channel estimation by a terminal and a base station, where the terminal reports a maximum span supported for joint channel estimation and dynamically determines a second duration that ensures power and phase consistency, enhancing uplink channel coverage and reliability in NTN networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the terminal uses the maximum span for joint channel estimation in NTN, then the coverage of uplink channel is enhanced, but power consistency and phase continuity cannot be guaranteed
Solution Approach 1:
The patent applies dynamics by making the joint channel estimation duration adaptive rather than fixed. The terminal dynamically determines a second duration that is less than or equal to the maximum span based on whether it can maintain power consistency and phase continuity. This dynamic adjustment allows the system to optimize coverage while ensuring reliability conditions are met.
Solution Approach 2:
The patent changes the parameter of estimation duration from a fixed maximum span to a variable second duration. The terminal adjusts this parameter based on its ability to maintain power consistency and phase continuity, thereby resolving the contradiction between maximizing coverage and ensuring signal quality.
2Reliability
If the terminal reduces the duration of joint channel estimation to maintain power consistency, then reliability is improved, but coverage enhancement is reduced
Solution Approach 1:
The system dynamically adjusts the estimation duration based on terminal capability. When the terminal can maintain power consistency and phase continuity over the maximum span, the full span is used for maximum coverage. When it cannot, the duration is reduced to ensure reliability, thus dynamically optimizing the trade-off.
Solution Approach 2:
The terminal performs partial joint channel estimation by using a second duration that is less than or equal to the maximum span. This partial action ensures that power consistency and phase continuity are maintained within the reduced duration, achieving reliable coverage enhancement within feasible limits.
3Reliability
If the terminal dynamically determines the second duration, then reliability of uplink transmission is improved, but signaling overhead increases
Solution Approach 1:
The terminal autonomously determines the second duration based on its own capability to maintain power consistency and phase continuity. This self-service approach eliminates the need for extensive base station configuration and signaling, as the terminal independently makes the optimization decision.
Solution Approach 2:
The terminal reports the first duration (maximum span) to the base station and provides effective indication information about the second duration. This feedback mechanism allows the base station to understand the terminal's capability and the chosen duration without requiring complex real-time signaling for every adjustment.
Data Source
AI summary
A method for determining a duration is performed by a terminal, and includes: determining a first duration, wherein the first duration is a maximum span supported by the terminal for performing joint channel estimation on uplink channel; reporting the first duration to a base station; determining a second duration for performing joint channel estimation on uplink channel, wherein the second duration is less than or equal to the first duration; and determining that the second duration takes effect.