Segment Symbol Puncturing for NTN Uplink Synchronization
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Solution Overview
Problem
In non-terrestrial networks (NTN), the rapid change in distance between terminal devices and network devices, such as satellites, requires higher timing processing capabilities to maintain uplink synchronization. Conventional timing advance processing in terrestrial networks is insufficient, leading to potential overlap between segments and degradation of PUSCH performance due to symbol puncturing.
Innovation Solution
A scheme for symbol puncturing in segment processing is introduced, where a terminal device determines a puncturing pattern for segments to be transmitted, indicating which segments to puncture. This pattern can be predefined or received from the network, allowing flexible switching of punctured symbols between segments to maintain synchronization and reduce repetition gain loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional timing advance processing is used in terrestrial networks, then device complexity is reduced, but uplink synchronization reliability deteriorates in NTN due to rapid distance changes
Solution Approach 1:
The transmission is divided into multiple segments, and puncturing is applied selectively to specific segments based on a determined puncturing pattern. This segmentation allows timing advance processing to be applied in a distributed manner across segments, improving synchronization reliability without requiring the entire transmission to handle the most complex timing scenarios simultaneously.
Solution Approach 2:
The puncturing pattern is determined dynamically based on timing advance values and can be switched between different patterns. This dynamic adaptation allows the system to adjust to rapid distance changes in NTN by selecting appropriate puncturing strategies, thereby maintaining synchronization reliability while managing processing complexity through adaptive rather than static configurations.
2Reliability
If symbol puncturing is performed to maintain synchronization in NTN, then uplink synchronization reliability is improved, but PUSCH performance deteriorates due to repetition gain loss
Solution Approach 1:
Puncturing is applied locally to specific segments rather than uniformly across all segments. The puncturing pattern identifies which segments should be punctured based on timing advance requirements, allowing synchronization to be maintained in critical segments while preserving PUSCH performance in non-punctured segments through repetition gain.
Solution Approach 2:
Instead of puncturing all segments, the invention applies partial puncturing only to the extent necessary for maintaining synchronization. The puncturing pattern determines the minimum necessary puncturing action, avoiding excessive puncturing that would unnecessarily degrade PUSCH performance while still achieving the synchronization goal.
3Adaptability or versatility
If flexible puncturing patterns are implemented to maintain synchronization, then adaptability to NTN conditions is improved, but device complexity increases
Solution Approach 1:
The system adapts to NTN conditions by changing parameters such as the puncturing pattern selection based on timing advance values. Rather than implementing complex real-time optimization, the invention uses parameter changes (selecting from predefined patterns or adjusting pattern parameters) to achieve adaptability while controlling device complexity through parameter-based rather than structurally complex solutions.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer-readable storage medium for symbol puncturing in segment processing. In some example embodiments, a first determines a puncturing pattern for one or more segments for performing puncturing, the puncturing pattern indicating at least one segment of the one or more segments to be punctured. The first device further performs puncturing on the one or more segments based on the puncturing pattern and transmits the one or more segments to the second device.