Multi-TRP PDSCH Processing Timeline Relaxation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing PDSCH/PUSCH processing capabilities, particularly in multi-TRP scenarios, where existing solutions do not effectively support low latency HARQ-ACK feedback and PUSCH processing.
Innovation Solution
The proposed solution involves capability reporting for PDSCH/PUSCH processing, where UEs indicate support for specific processing capabilities, such as PDSCH processing capability 2, under certain conditions, and the implementation of processing timeline relaxation for Multi-DCI Multi-TRP and Single-DCI Multi-TRP schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-TRP processing is implemented to improve throughput and reliability, then data transmission performance is improved, but processing complexity and latency increase
Solution Approach 1:
The patent segments the multi-TRP processing into distinct capability levels (capability 1 and capability 2), where each capability handles specific processing scenarios. This segmentation allows the system to activate only the necessary processing level based on network conditions and UE capabilities, reducing overall complexity while maintaining high throughput when needed.
Solution Approach 2:
The patent implements dynamic processing timeline relaxation that adjusts processing requirements based on the configured multi-TRP scheme and UE capability. The processing timeline can be relaxed or tightened dynamically depending on whether capability 1 or capability 2 is configured, allowing the system to adapt processing complexity to actual needs rather than maintaining fixed high complexity always.
2Loss of time
If strict processing timelines are enforced to reduce latency, then HARQ-ACK feedback latency is reduced, but processing reliability deteriorates under multi-TRP conditions
Solution Approach 1:
The patent changes the processing timeline parameter dynamically based on UE capability and configured multi-TRP scheme. For capability 2 UEs with appropriate configurations, stricter timelines can be enforced to reduce latency. For capability 1 or less favorable conditions, the timeline is relaxed to ensure reliable processing, thus adapting the time parameter to balance latency and reliability requirements.
3Productivity
If capability reporting is implemented to improve processing efficiency, then system optimization is improved, but signaling overhead increases
Solution Approach 1:
The patent designs the capability reporting mechanism to serve multiple functions: it not only informs the network of UE processing capabilities but also triggers appropriate processing timeline configurations and multi-TRP scheme selections. This multi-functionality reduces the need for separate signaling messages, as the capability report itself activates a suite of optimized processing behaviors, thereby improving efficiency while limiting additional overhead.
Data Source
AI summary
Techniques for physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) processing for multiple transmission and reception point (multi-TRP) are disclosed. In some embodiments, determining PDSCH hybrid automatic repeat request-acknowledgement (HARQ-ACK) processing timing may include determining that a user equipment (UE) is configured for single downlink control information (single-DCI) multi-TRP PDSCH operation, determining a first PDSCH and a second PDSCH within a slot, wherein the first PDSCH and the second PDSCH are used in the single-DCI multi-TRP PDSCH operation, and determining a minimum HARQ-ACK processing timing for the first PDSCH and the second PDSCH using one or more symbols of the first PDSCH or one or more symbols of both the first PDSCH and the second PDSCH.