PUCCH HARQ-ACK Multiplexing With SR Bits Across Priorities
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in multiplexing UCI with different priorities, such as PUCCH transmissions with high and low priority HARQ-ACK and SR, leading to inefficiencies in resource allocation and transmission.
Innovation Solution
The system enables multiplexing of UCI with different priorities by generating SR bits for HARQ-ACK, where high priority SR bits are multiplexed with high priority HARQ-ACK and low priority HARQ-ACK on a physical uplink control channel (PUCCH) resource, allowing for efficient transmission of both types of signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are allocated for high priority HARQ-ACK, low priority HARQ-ACK, and SR transmissions, then transmission reliability for each signal type is maintained, but resource allocation complexity and system overhead increase
Solution Approach 1:
The patent combines multiple UCI types (high priority HARQ-ACK, low priority HARQ-ACK, and SR) into a single PUCCH transmission. The UE generates a unified PUCCH that multiplexes these different priority signals together, reducing the need for separate resource allocations while maintaining transmission reliability through priority-based multiplexing rules.
Solution Approach 2:
The PUCCH resource is designed to serve multiple functions by accommodating different UCI types with different priorities. A single PUCCH configuration can carry high priority HARQ-ACK, low priority HARQ-ACK, and SR simultaneously, making the resource allocation mechanism more versatile and reducing overall system complexity.
2Adaptability or versatility
If multiple PUCCH transmissions are scheduled simultaneously for different priorities, then communication flexibility is improved, but transmission efficiency and resource utilization deteriorate due to overlapping and conflicts
Solution Approach 1:
The patent implements dynamic priority-based multiplexing where the UE dynamically determines which UCI types to multiplex together based on their priorities. The system adapts the multiplexing behavior in real-time, allowing flexible communication while maintaining transmission efficiency by resolving conflicts through priority-based selection rules.
Solution Approach 2:
The system changes the multiplexing parameters dynamically based on UCI priority levels. When high priority UCI is present, it takes precedence in the multiplexing decision, altering the transmission parameters to ensure high priority signals are transmitted efficiently while still accommodating lower priority signals when resources permit.
3Loss of information
If SR bits are generated for all SR configurations, then completeness of scheduling request information is ensured, but payload size and processing overhead increase
Solution Approach 1:
The patent extracts only the necessary SR bits based on which SR configurations are actually triggered. Instead of generating bits for all possible SR configurations, the system selectively includes only those SR bits corresponding to active scheduling requests, reducing payload size while maintaining information completeness for triggered SRs.
Solution Approach 2:
The system applies partial action by generating SR bits only for triggered SR configurations rather than all configured SRs. This selective approach ensures that the payload contains exactly the information needed for current scheduling requests without unnecessary overhead from inactive SR configurations.
Data Source
AI summary
A user equipment (UE) is described. The UE includes a processor configured to determine whether scheduling request (SR) reporting with hybrid automatic repeat request-acknowledgement (HARQ-ACK) with different priorities is supported. The processor is also configured to generate SR bits for multiplexing HARQ-ACK, wherein the HARQ-ACK having different priorities. The processor is further configured to multiplex the HARQ-ACK and the SR bits. The UE also includes transmitting circuitry configured to transmit the multiplexed HARQ-ACK and SR bits on a physical uplink control channel (PUCCH).