HP SR Multiplexing on LP PUSCH via Bit Appending
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Solution Overview
Problem
Current wireless communication systems face limitations in flexibility and efficiency, particularly in handling high priority (HP) scheduling requests (SR) and hybrid automatic repeat request-acknowledgement (HARQ-ACK) multiplexing on low priority (LP) physical uplink shared channels (PUSCH), leading to potential drops in important HP HARQ-ACK data when HP SR overlaps with LP PUSCH.
Innovation Solution
The system configures circuitry in user equipment (UE) and base stations (gNB) to append and multiplex HP SR bits with HP HARQ-ACK bits on LP PUSCH, allowing for dynamic indication by downlink control information (DCI), ensuring that HP SR is appropriately handled and prioritized to prevent data loss during overlapping conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HP SR PUCCH resources overlap with LP PUSCH, then HP SR can be transmitted, but HP HARQ-ACK multiplexing on LP PUSCH is lost
Solution Approach 1:
The patent merges HP SR and HP HARQ-ACK into a single PUCCH transmission by appending SR bits to HARQ-ACK bits. This combination allows both information types to be transmitted together on the same resource, eliminating the conflict where HP SR would otherwise cause HP HARQ-ACK to be dropped when overlapping with LP PUSCH.
Solution Approach 2:
The patent introduces an intermediary mechanism where the PUCCH format is selected based on the presence of SR. When SR is present, PUCCH format 1 is used with appended SR bits; when SR is absent, PUCCH format 0 is used. This intermediary selection process resolves the conflict between HP SR transmission and HP HARQ-ACK multiplexing.
2Ease of operation
If communication structure is simplified, then ease of operation improves, but flexibility and efficiency decrease
Solution Approach 1:
The patent introduces dynamic adaptability by making the PUCCH format selection dependent on whether SR is present. The system dynamically switches between PUCCH format 0 (when SR is absent) and PUCCH format 1 (when SR is present), allowing the communication structure to adapt to different transmission scenarios while maintaining operational simplicity through standardized formats.
Solution Approach 2:
The patent changes the parameter of PUCCH format selection based on the presence of SR. By modifying which PUCCH format is used (0 or 1) depending on SR status, the system achieves flexibility in handling different uplink control information scenarios without complicating the overall communication structure.
Data Source
AI summary
A user equipment (UE) is described. The UE includes circuitry configured to, in a case that a high priority (HP) physical uplink control channel (PUCCH) for up to 2 bits of HP hybrid automatic repeat request-acknowledgement (HARQ-ACK) with PUCCH format 0 or PUCCH format 1 overlaps with one or more HP scheduling request (SR) PUCCH resources with PUCCH format 0 or PUCCH format 1 and a low priority (LP) physical uplink shared channel (PUSCH), and if HIP HARQ-ACK multiplexing on the LP PUSCH is configured and/or dynamically indicated by downlink control information (DCI), append 1 bit for HP SR to the HP HARQ-ACK. A bit of 1 indicates a positive HP SR or (indicates a negative HP SR. The circuitry is also configured to multiplex the combined up to 2 bits of HARQ-ACK and the 1 bit of SR on the LP PUSCH as HP HARQ-ACK bits.