HARQ-ACK and CSI Multiplexing Sub-Slot Alignment
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing sub-slot based hybrid automatic repeat request acknowledgement (HARQ-ACK) and slot based channel state information (CSI) reports, leading to increased latency and reliability issues due to misalignment of uplink resources in different sub-slots.
Innovation Solution
A user equipment (UE) and base station configuration that determines whether the second uplink resource for multiplexing CSI reports is in the same sub-slot as the first uplink resource for HARQ-ACK, allowing for appropriate transmission strategies to maintain latency and reliability by ensuring the second uplink resource is aligned with the first uplink resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HARQ-ACK and CSI reports are multiplexed on different sub-slots, then resource utilization is improved, but latency and reliability deteriorate
Solution Approach 1:
The patent segments the time slot into sub-slots and assigns different uplink resources (first uplink resource for HARQ-ACK, second uplink resource for CSI reports) to different sub-slots. This segmentation allows simultaneous transmission of HARQ-ACK and CSI reports without multiplexing them on the same resource, thereby maintaining HARQ-ACK reliability while improving overall resource utilization.
2Reliability
If HARQ-ACK and CSI reports are transmitted on separate uplink resources, then reliability is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the first uplink resource for HARQ-ACK and the second uplink resource for CSI reports are configured based on sub-slot timing requirements. The system dynamically determines resource allocation to ensure HARQ-ACK is transmitted with appropriate reliability while efficiently utilizing available uplink resources across different sub-slots.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a downlink communication. The UE may receive a configuration identifying a first uplink resource for a hybrid automatic repeat request acknowledgement (HARQ-ACK) and a second uplink resource for multiplexing channel state information (CSI) reports. The UE may receive a downlink communication. The UE may determine that a HARQ-ACK for the downlink communication is to be multiplexed with one or more CSI reports on the second uplink resource. The UE may determine that an error has occurred based at least in part on a determination that the second uplink resource configured is in a different sub-slot than the first uplink resource. Numerous other aspects are provided.