Uplink Information Transmission with PUCCH–PUSCH Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies, such as Rel-15 New Radio (NR), struggle to effectively handle collisions between Uplink Control Information (UCI) and Uplink Shared Channel (UL-SCH) due to unclear mapping of logical channels to Physical Uplink Shared Channels (PUSCH), leading to inefficiencies in handling different traffic types like eMBB and URLLC.
Innovation Solution
Implementing methods for prioritization and multiplexing behaviors among HARQ-ACK/SR/CSI and PUSCH, providing two PUCCH resources for HARQ-ACK feedback, and detailed rules for dropping or multiplexing CSI reports based on physical layer priorities, ensuring efficient resource utilization and minimizing throughput degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UCI is multiplexed in PUSCH when PUCCH collides with PUSCH, then resource utilization is improved, but collision handling complexity increases due to unclear mapping rules
Solution Approach 1:
The patent segments the uplink channels into different priority levels (high priority for URLLC, low priority for eMBB) and applies different handling rules to each segment. This segmentation allows clear differentiation between channel types and enables targeted collision resolution strategies for each priority level, reducing overall complexity while maintaining efficient resource utilization.
Solution Approach 2:
The patent applies different collision handling rules to different local channels based on their priority. High priority channels (URLLC) have preferential treatment over low priority channels (eMBB) during collisions. This local differentiation ensures that critical control information and high-value data are protected while allowing flexible multiplexing of lower-priority traffic, thereby improving overall system efficiency without increasing complexity.
2Reliability
If prioritization rules are implemented for different traffic types, then collision handling is improved, but device complexity increases
Solution Approach 1:
The patent introduces a priority parameter that can be configured for different channels and traffic types. By changing this parameter value based on channel type (PUCCH vs PUSCH) and traffic priority (URLLC vs eMBB), the system achieves reliable collision handling through simple parameter comparison rather than complex decision logic. This parameter-based approach maintains low device complexity while improving collision resolution reliability.
3Productivity
If two PUCCH resources are provided for HARQ-ACK feedback, then throughput degradation is minimized, but resource allocation complexity increases
Solution Approach 1:
The patent introduces a time-domain dimension to resource allocation by providing two PUCCH resources at different timing opportunities. The first PUCCH resource is available when the UE has finished processing the first PDSCH, while the second PUCCH resource is available after processing the second PDSCH. This temporal dimension allows the system to minimize throughput degradation by enabling early HARQ-ACK feedback for low-priority traffic without interfering with high-priority traffic, while the complexity increase is limited to simple timing-based resource selection.
Data Source
AI summary
A PUCCH configuration including information of at least one PUCCH resource can be received (310) at a UE. An UL grant for at least one high-priority PUSCH can be received (320). The UL grant can indicate the UE to include a CSI report in the at least one high-priority PUSCH. A particular PUSCH of the at least one high-priority PUSCH can overlap with a PUCCH resource of the at least one PUCCH resource. A determination can be made (330) as to whether there is UCI to transmit on the PUCCH resource. The particular PUSCH can be transmitted (340) according to the UL grant by including the CSI report in the particular PUSCH when there is UCI to transmit on the PUCCH resource.