HARQ Feedback Control for Multi-slot Transmission in Non-terrestrial Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing bandwidth and resource allocation across diverse user equipment (UE) capabilities and network conditions, leading to suboptimal performance and increased latency.
Innovation Solution
The implementation of advanced bandwidth management techniques, including dynamic bandwidth part (BWP) configuration and adaptive resource allocation, allows for real-time adjustment of bandwidth and resource usage based on UE capabilities and network conditions, optimizing performance and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed bandwidth allocation is used, then device complexity is reduced, but system efficiency and adaptability deteriorate
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the network can adjust the bandwidth part (BWP) size based on real-time channel conditions and UE capabilities. The gNodeB dynamically configures BWPs through RRC signaling, allowing the system to adapt from fixed to variable bandwidth allocation, thereby improving adaptability while managing complexity through standardized procedures.
Solution Approach 2:
The patent changes the bandwidth parameter dynamically by configuring different BWP sizes (e.g., 1.4MHz, 3.6MHz, 7.2MHz, 10.8MHz, 13.8MHz) based on channel conditions and UE capabilities. This parameter adjustment allows the system to optimize spectral efficiency while maintaining manageable complexity through predefined bandwidth configurations.
2Productivity
If dynamic bandwidth allocation is implemented, then system efficiency and throughput are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent segments the total bandwidth into multiple discrete bandwidth parts (BWPs) that can be independently configured and activated. This segmentation allows the system to allocate only the necessary bandwidth to each UE based on their capabilities and channel conditions, improving throughput efficiency while managing complexity through standardized segmentation units.
Solution Approach 2:
The patent implements a universal BWP configuration mechanism that serves multiple functions: initial bandwidth allocation, adaptive bandwidth adjustment, and support for different UE capabilities. The same BWP framework handles various scenarios including wideband and narrowband operations, reducing overall system complexity through multi-functionality.
3Productivity
If bandwidth is allocated based on UE capabilities, then resource allocation efficiency is improved, but measurement and detection difficulty increase
Solution Approach 1:
The patent performs preliminary capability negotiation during the RRC setup phase, where the gNodeB and UE exchange capability information before actual data transmission begins. This preliminary action allows the system to pre-determine appropriate bandwidth allocations based on UE capabilities, improving resource allocation efficiency while avoiding the need for continuous real-time measurement during active transmission.
Data Source
AI summary
A wireless device receives one or more configuration parameters for disabling hybrid automatic repeat request (HARQ) feedback. The one or more configuration parameters indicate one or more feedback enabled downlink HARQ processes and one or more feedback disabled downlink HARQ processes. The wireless device receives a downlink control information (DCI) scheduling multiple transport blocks (TBs). The wireless device receives the multiple TBs. The wireless device transmits multiple HARQ-acknowledgments (HARQ-ACKs) information corresponding to the multiple TBs. A HARQ process, associated with a first TB of the multiple TBs, is a feedback disabled HARQ process.