HARQ Feedback Timing Determination in 5G NR Wireless Nodes
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Solution Overview
Problem
In 5G NR systems, determining the slot or sub-slot for HARQ feedback in wireless communications, especially when part of PDSCH receptions are scheduled with enabled HARQ feedback and the rest with disabled HARQ feedback, is a challenging issue that affects transmission efficiency and delay.
Innovation Solution
A method where a first signaling indicates HARQ process numbers corresponding to multiple bit blocks, allowing the determination of a target time unit for HARQ-ACK feedback by using the latest physical channel and a time-domain offset, enabling efficient timing indication and reducing delay and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single DCI schedules multiple PDSCH receptions with different HARQ feedback configurations, then scheduling flexibility and resource utilization are improved, but determining the HARQ feedback timing becomes complex and ambiguous
Solution Approach 1:
The patent applies local quality by associating different HARQ feedback configurations with specific bit blocks within the multiple PDSCH receptions. Each bit block can have its own HARQ feedback enabling/disabling status, allowing selective feedback timing determination for different parts of the scheduled data, thus resolving the timing ambiguity while maintaining scheduling flexibility
Solution Approach 2:
The patent segments the multiple PDSCH receptions into individual bit blocks, each with its own HARQ process number and feedback configuration. This segmentation allows the system to independently determine feedback timing for each bit block based on its specific HARQ configuration, reducing the overall complexity of timing determination
2Reliability
If HARQ feedback is enabled for all PDSCH receptions, then reliability is improved, but feedback overhead and delay increase
Solution Approach 1:
The patent implements partial action by enabling HARQ feedback only for specific bit blocks that require retransmission reliability, while disabling it for other bit blocks where reliability can be ensured through other means. This selective approach reduces feedback overhead and delay while maintaining necessary reliability
Solution Approach 2:
The patent changes the HARQ feedback parameter (enabling/disabling) on a per-bit-block basis rather than uniformly for all PDSCH receptions. This allows dynamic adjustment of feedback timing and overhead based on the specific requirements of each bit block, optimizing the trade-off between reliability and delay
Data Source
AI summary
The present application discloses a method and a device in a node for wireless communications. A first receiver, receives a first signaling; respectively receives M bit blocks on the M physical channels, M being a positive integer greater than 1; a first transmitter transmits a first signal in a target time unit, the first signal carries a first HARQ-ACK bit block; herein, the first signaling is used to indicate first-type bit block(s) in the M bit blocks, and a number of the first-type bit block(s) in the M bit blocks is a positive integer less than M; the M physical channels are mapped to transport channel(s) of a same type; the first signaling indicates configuration information of the M physical channels; the first signaling indicates a first time-domain offset.