Multicast HARQ-ACK Routing on PUSCH During PUCCH Overlap
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting physical uplink control channel (PUCCH) with multicast hybrid automatic repeat request acknowledgement (HARQ-ACK) information, particularly in overlapping scenarios with other channels, leading to inefficiencies and potential data loss.
Innovation Solution
The method involves determining HARQ-ACK information bits only when a PUCCH resource overlaps with a physical uplink shared channel (PUSCH) and transmitting these bits on the PUSCH, while handling overlapping conditions with PUCCH resources to ensure accurate and efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH resources are allocated for multicast HARQ-ACK information transmission, then HARQ-ACK feedback capability is improved, but resource overlap conflicts with PUSCH transmissions increase
Solution Approach 1:
The patent extracts the HARQ-ACK information from the PUCCH channel and places it into the PUSCH channel for transmission. This is achieved by determining HARQ-ACK information bits and transmitting them on PUSCH when PUCCH resources overlap with PUSCH transmissions, thereby avoiding resource conflicts while maintaining feedback capability
Solution Approach 2:
The patent merges the control information (HARQ-ACK) with the data transmission channel (PUSCH). By combining these transmissions on the same channel, the system eliminates resource overlap conflicts between separate PUCCH and PUSCH transmissions while ensuring both control and data are delivered reliably
2Productivity
If PUCCH and PUSCH transmissions overlap in time, then channel utilization is improved, but data loss risk increases
Solution Approach 1:
The patent performs preliminary determination of HARQ-ACK information bits before transmission, checking whether PUCCH resources overlap with PUSCH transmissions. Based on this preliminary assessment, the system proactively routes HARQ-ACK information to PUSCH when overlap is detected, preventing potential data loss before it occurs
Solution Approach 2:
The patent introduces a conditional transmission mechanism as an intermediary between PUCCH resource allocation and actual HARQ-ACK transmission. This mediator evaluates overlap conditions and directs HARQ-ACK information to the appropriate channel (PUCCH or PUSCH), ensuring reliable delivery while maintaining high channel utilization
Data Source
AI summary
Apparatuses and methods for transmitting a physical uplink control channel (PUCCH) with multicast hybrid automatic repeat request acknowledgement (HARQ-ACK) information. A method includes receiving information for a set of PUCCH resources and first physical downlink shared channels (PDSCHs) that provide first transport blocks (TBs). The method further includes determining first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first TBs and to provide the first HARQ-ACK information bits only when at least one PUCCH resource from the set of PUCCH resources overlaps in time with a transmission of a first physical uplink shared channel (PUSCH). A value for each of the first HARQ-ACK information bits corresponds to positive acknowledgement (ACK). The method further includes transmitting the first PUSCH. The first PUSCH includes the first HARQ-ACK information bits when the at least one PUCCH resource overlaps in time with the first PUSCH.