Terminal Capability Indication for Uplink Timing Advance
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Solution Overview
Problem
In non-terrestrial networks, terminals face challenges in compensating for timing advances in segment-based uplink transmissions due to the complexity of pre-compensating timing advances for each segment, leading to limited support from all terminals.
Innovation Solution
A capability indication method and apparatus for terminals to transmit capability indication information to network-side devices, indicating support for uplink transmission timing advance pre-compensation for segment-based transmission, and a capability determination method for network-side devices to determine terminal capabilities based on received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If uplink transmission timing advance pre-compensation is performed for each segment separately, then timing advance compensation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the uplink transmission into multiple segments and applies timing advance pre-compensation to each segment separately. This segmentation allows the terminal to handle long PUSCH transmissions by dividing them into manageable parts, each with its own timing compensation, thereby improving overall compensation accuracy without requiring the terminal to handle the entire long transmission as a single complex operation.
Solution Approach 2:
The patent implements preliminary timing advance compensation before each segment transmission. By calculating and applying the timing advance compensation in advance for each segment, the terminal ensures that timing adjustments are made proactively rather than reactively, improving compensation accuracy while simplifying the real-time processing requirements.
2Reliability
If segment-based transmission with separate timing advance pre-compensation is implemented, then communication reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent requires terminals to perform preliminary capability indication to the network side before actual transmission. By提前 indicating whether the terminal supports segment-based timing advance pre-compensation, the network can configure appropriate transmission parameters in advance, ensuring reliable communication while simplifying the terminal's operational burden during actual data transmission.
Solution Approach 2:
The patent introduces dynamic capability indication and network-side configuration based on terminal capabilities. The system dynamically adjusts transmission parameters according to whether the terminal supports segment-based timing advance pre-compensation, allowing the network to optimize communication reliability for each terminal's specific capabilities without requiring uniform complex operations across all terminals.
3Measurement precision
If capability indication information is transmitted, then network configuration accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential capability information from the terminal and transmits it to the network side. By identifying and transmitting only the critical capability indication (whether the terminal supports segment-based timing advance pre-compensation) rather than all possible terminal parameters, the system achieves accurate capability determination while minimizing information transmission overhead.
Solution Approach 2:
The patent implements self-service capability indication where the terminal autonomously determines and indicates its own capability status regarding segment-based timing advance pre-compensation. This self-service approach eliminates the need for complex network-side capability detection procedures, reducing the information exchange required while maintaining accurate capability information for network configuration.
Data Source
AI summary
A method, apparatus and computer readable medium for indicating and determining the capability of a terminal to support uplink transmission timing advance pre-compensation for segment-based transmission in a wireless communication system. The capability of the terminal is determined by: transmitting capability indication information to a network-side device, where the capability indication information is configured to indicate a capability of the terminal to support uplink transmission timing advance pre-compensation for segment-based transmission.