Gap-Based Control Signaling for Efficient NTN Repeated Transmissions
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Solution Overview
Problem
Non-terrestrial networks face challenges such as Doppler frequency shifting and long transmission round trip times due to satellite movement, leading to lengthy and inefficient data transmissions in NTN systems.
Innovation Solution
Adjusting repeated transmission schedules by transmitting control information during uplink or downlink gaps, including beam switching, termination, and compensation gaps to optimize communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission is repeated to ensure reliability in NTN systems, then transmission reliability is improved, but transmission duration increases and productivity decreases
Solution Approach 1:
The patent implements feedback mechanisms where the wireless communication device sends acknowledgments or status information back to the network node. This allows the system to determine when transmissions have been successfully received and when repetitions can be stopped, preventing unnecessary repeated transmissions and improving overall transmission efficiency while maintaining reliability.
Solution Approach 2:
The system performs partial repetitions of data transmission based on actual need rather than always completing full repetition cycles. By using feedback to detect successful reception, the system can stop repetitions early, avoiding excessive transmission actions and reducing overall transmission duration.
2Productivity
If control information is transmitted during gaps to optimize scheduling, then transmission scheduling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent makes the gap periods serve multiple functions: they are used both for traditional purposes (timing alignment, frequency synchronization) and for transmitting control information. This multi-functionality improves scheduling efficiency without requiring separate dedicated control channels, thereby limiting the increase in device complexity.
Solution Approach 2:
The system merges control information transmission with the existing gap structure. Instead of adding separate control channels or time slots, the patent combines control signaling with the gap periods that already exist in the transmission framework, improving efficiency while avoiding additional complexity from separate mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances communication efficiency by reducing unnecessary repetitions and power consumption, while maintaining connectivity in NTN systems.
Implementation Method 1
The fast movement of satellites relative to a user's position on earth can lead to Doppler frequency shifting
Data Source
AI summary
A system and method for transmission indications are disclosed herein. In one embodiment, the system and method are configured to transmit, by a wireless communication node to a wireless communication device, within an uplink gap or a downlink gap, control information.