SDT Processing in Non-Terrestrial Networks via Location-Based Timing Advance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Small Data Transmission (SDT) solutions are primarily designed for Tenant Networks (TN) and fail to effectively support SDT in Non-Terrestrial Networks (NTN) due to the near-far effect of signal quality in NTN cells, leading to intra-cell interference and communication challenges.
Innovation Solution
A method for SDT processing in NTN systems that considers location information to determine valid Timing Advance (TA) values and initiate appropriate transmission conditions, such as resource allocation and access processes, to ensure time synchronization and avoid intra-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SDT technology is applied in NTN without considering location information, then SDT can be implemented, but the near-far effect of signal quality causes intra-cell interference
Solution Approach 1:
The patent applies local quality by making the SDT transmission condition determination location-dependent. Different location information (distance from satellite, cell position) results in different TA value validity assessments and SDT transmission permissions. This ensures that terminals in different local positions within the NTN cell are handled appropriately, preventing near-far effect interference while maintaining SDT functionality.
2Productivity
If TA value is determined without location information, then transmission can proceed, but time synchronization cannot be ensured leading to incorrect decoding
Solution Approach 1:
The patent applies preliminary action by determining TA value validity based on location information before SDT transmission occurs. The terminal device checks whether it meets the first preset condition (location-based criteria) prior to transmitting, ensuring that time synchronization is established in advance. This prevents transmission errors due to poor synchronization while avoiding unnecessary delays.
3Ease of operation
If SDT transmission condition is determined without location information, then transmission can be initiated, but near-far effect cannot be covered causing interference
Solution Approach 1:
The patent applies feedback by using location information as a feedback mechanism to determine SDT transmission conditions. The terminal device continuously monitors its location relative to the satellite and adjusts transmission behavior accordingly. This feedback loop ensures that terminals experiencing near-far effects are identified and handled appropriately, preventing interference while maintaining ease of operation through automated condition assessment.
Data Source
AI summary
This disclosure provides a method, communication device, and storage medium for Small Data Transmission (SDT) processing in a non-terrestrial network (NTN), applicable to NTN systems. In one example of the method, the terminal device determines the SDT transmission conditions based on its location information after determining the location information of the terminal device. Thus, by considering location information when applying SDT technology in the NTN, the near-far effects of signal quality in NTN cells can be covered when using signal quality as the determination criterion, effectively avoiding interference within the cells, thereby enabling the NTN to support SDT.