Satellite PUSCH Transmission Using Adaptive OCC and RV Assignment
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Solution Overview
Problem
Existing wireless communication systems, particularly in satellite communication, face challenges in efficiently managing physical uplink shared channel (PUSCH) transmissions in non-terrestrial networks, such as those involving orthogonal cover code (OCC) groups and redundancy version (RV) values, which affect data transmission reliability and latency.
Innovation Solution
A method and device for a user equipment (UE) and base station in a communication system that identifies PUSCH transmissions and applies the same redundancy version (RV) value for one OCC group, cyclically applying RV values when the repetition number exceeds the OCC length, enhancing data transmission in non-terrestrial networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different RV values are applied to different OCC groups in satellite communication, then data transmission reliability can be improved through diversity, but transmission latency increases due to the need to wait for multiple repetitions
Solution Approach 1:
The patent dynamically adjusts the RV application strategy based on the relationship between repetition number and OCC length. When repetition number exceeds OCC length, it cycles RV values across OCC groups; otherwise, it applies the same RV value. This dynamic adaptation resolves the contradiction by optimizing the balance between reliability and latency according to actual transmission conditions.
Solution Approach 2:
The patent changes the parameter application mode (same RV vs. cyclic RV) based on the repetition number and OCC length relationship. This parameter change allows the system to switch between reliability-optimized mode (cyclic RV when repetitions > OCC length) and latency-optimized mode (same RV when repetitions ≤ OCC length), effectively resolving the technical contradiction.
2Loss of time
If the same RV value is applied to all OCC groups, then transmission latency is reduced, but data transmission reliability deteriorates due to lack of diversity
Solution Approach 1:
The system dynamically selects between same-RV and cyclic-RV strategies based on real-time parameters (repetition number and OCC length), allowing it to adaptively balance latency and reliability requirements rather than using a fixed approach.
Solution Approach 2:
The patent changes the RV application parameter based on the comparison between repetition number and OCC length, enabling the system to switch between latency-optimized and reliability-optimized modes as needed.
3Reliability
If complex RV management strategies are implemented for each OCC group, then data transmission reliability improves, but system complexity increases
Solution Approach 1:
The patent segments the RV management into two clear cases based on the relationship between repetition number and OCC length. This segmentation simplifies the complex decision-making process into two straightforward rules, reducing system complexity while maintaining reliability benefits.
Solution Approach 2:
The patent uses a simple parameter comparison (repetition number vs. OCC length) to determine the RV management strategy, avoiding complex algorithms while still achieving reliable transmission through appropriate RV selection.
Data Source
AI summary
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting higher data transfer rates. A method performed by a user equipment (UE) in a communication system is provided. The method includes identifying physical uplink shared channel (PUSCH) transmissions to be transmitted on slots, identifying orthogonal cover code (OCC) groups corresponding to the PUSCH transmissions, and transmitting, on the slots, the PUSCH transmissions with OCC applied based on the OCC groups, wherein a same redundancy version (RV) value is applied for one OCC group among the OCC groups.