PUCCH Resource Multiplexing for 5G NR HARQ-ACK Overlap
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Solution Overview
Problem
In 5G NR wireless communication systems, the overlap of PUCCH resources for different service types, such as eMBB and URLLC, leads to time domain conflicts, necessitating efficient resource multiplexing to resolve latency and reliability issues.
Innovation Solution
A method and device for determining resource multiplexing by checking if the first PUCCH resource of one service type overlaps with the second PUCCH resource in the time domain, and if a preset timing condition is met, performing resource multiplexing processing by carrying HARQ-ACK information of both service types on the same PUCCH resource, particularly using PUCCH resources configured at the subslot level to avoid conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH resources for different service types are allocated separately, then service reliability is improved, but time domain conflicts occur causing increased latency
Solution Approach 1:
The patent merges PUCCH resources of different service types (eMBB and URLLC) into shared resource pools. When URLLC HARQ-ACK needs to be transmitted, the system checks for resource conflicts with eMBB PUCCH resources. If conflicts exist, the URLLC transmission dynamically multiplexes with the scheduled eMBB PUCCH resource rather than waiting for a separate resource, thereby reducing latency while maintaining reliability through conflict detection and resolution mechanisms.
2Productivity
If PUCCH resources are shared between service types, then resource utilization is improved, but resource conflicts increase causing reliability degradation
Solution Approach 1:
The patent implements dynamic resource allocation where PUCCH resources are configured for both eMBB and URLLC services, but the actual assignment is determined dynamically at transmission time. The system checks whether URLLC HARQ-ACK transmission would conflict with scheduled eMBB PUCCH resources in the same time domain. Based on this dynamic check, the system either multiplexes URLLC with eMBB or selects alternative resources, thereby maintaining high resource utilization while preventing reliability degradation through conflict avoidance.
3Loss of time
If resource multiplexing is performed without timing condition checks, then latency is reduced, but demodulation accuracy deteriorates due to insufficient processing time
Solution Approach 1:
The patent introduces timing condition parameters (such as K1 values and time offset thresholds) that must be satisfied before resource multiplexing is performed. The system checks whether the time difference between eMBB PUCCH transmission and URLLC HARQ-ACK generation meets minimum processing requirements. Only when these timing parameters are satisfied does the system proceed with multiplexing, thereby ensuring sufficient processing time for accurate demodulation while still achieving low latency through conditional fast processing.
Data Source
AI summary
A method for determining resource multiplexing is provided. The method includes: when it is determined that a first physical uplink control channel (PUCCH) resource of a hybrid automatic repeat request response (HARQ-ACK) of a first type of service and a second PUCCH resource of an HARQ-ACK of a second type of service overlap in a time domain, determining whether the first PUCCH resource and the second PUCCH resource meet a preset timing sequence in the time domain; and if same meet the preset timing sequence condition, then determining performing resource multiplexing processing on the HARQ-ACK of the first type of service and the HARQ-ACK of the second type of service.