HARQ-ACK Timing Adjustment for Extended CORESET in NR
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Solution Overview
Problem
In new radio (NR) wireless communication systems, the increased CORESET duration for PDCCH monitoring affects the PDSCH processing duration, leading to challenges in determining the optimal timing for transmitting HARQ-ACK signals due to the need for blind detection of PDCCH before demodulating PDSCH.
Innovation Solution
A method for transmitting HARQ-ACK signals is introduced, where the user equipment sends or receives HARQ-ACK after a duration related to the number of OFDM symbols occupied by the control resource set in the time domain, specifically greater than 3, to align with the increased CORESET duration, allowing for reasonable processing time based on PDSCH-related parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of OFDM symbols occupied by the control resource set (CORESET) is increased to improve PDCCH monitoring capability, then the PDSCH processing duration is extended, but the timing for transmitting HARQ-ACK signals becomes uncertain and complex
Solution Approach 1:
The patent dynamically adjusts the first duration based on the number of OFDM symbols occupied by the control resource set. When the CORESET occupies more than 3 OFDM symbols, the first duration is extended accordingly. This parameter change ensures that the HARQ-ACK transmission timing adapts to the increased PDCCH monitoring requirements while maintaining deterministic timing
Solution Approach 2:
The patent introduces a dynamic timing mechanism where the first duration is not fixed but varies based on the actual CORESET configuration. The network device and user equipment both determine the HARQ-ACK transmission timing dynamically according to the number of OFDM symbols occupied by the control resource set, making the system flexible while maintaining timing certainty
2Reliability
If the first duration is extended to accommodate increased CORESET duration, then the processing time is sufficient, but the communication efficiency is reduced due to longer waiting time
Solution Approach 1:
The first duration is dynamically adjusted based on the actual CORESET configuration rather than being fixed. When CORESET occupies more than 3 OFDM symbols, the first duration is extended to ensure complete processing. When CORESET occupies 3 or fewer symbols, the first duration is reduced to minimize waiting time. This dynamic adjustment optimizes communication efficiency while ensuring processing completeness
Solution Approach 2:
The patent changes the first duration parameter based on the number of OFDM symbols occupied by the control resource set. This parameter adaptation allows the system to achieve the minimum required processing time without unnecessarily extending the HARQ-ACK transmission delay, thereby balancing reliability and productivity
Data Source
AI summary
The present disclosure provides a method and apparatus for transmitting hybrid automatic repeat request (HARD) acknowledgement (ACK) information, and a medium. The method comprises: in response to the number D of orthogonal frequency-division multiplexing (OFDM) symbols occupied in the time domain by a control resource set corresponding to a PDCCH being greater than 3, sending HARQ-ACK to a network device after a first duration of the end moment of the last OFDM symbol of a physical downlink shared channel (PDSCH), where the first duration is related to the number D of OFDM symbols occupied in the time domain by the control resource set corresponding to the PDCCH.