HARQ-ACK Payload Reduction for Mixed-Priority PUSCH Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing hybrid automatic repeat request-acknowledgement (HARQ-ACK) payloads with different priorities, particularly due to the large payload of low priority HARQ-ACK bits, which can lead to poor resource utilization and performance degradation on high priority channels.
Innovation Solution
The implementation of HARQ-ACK payload reduction methods, such as code block group (CBG) level compression, CBG to transport block (TB) level bundling, spatial bundling, and grouping, to reduce the payload of low priority HARQ-ACK bits, allowing for efficient multiplexing on physical uplink shared channels (PUSCH) and physical uplink control channels (PUCCH) based on configured thresholds and coding methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low priority HARQ-ACK bits are transmitted with full payload, then complete feedback information is provided, but resource utilization deteriorates and high priority channel performance degrades
Solution Approach 1:
The patent extracts only the essential HARQ-ACK information needed for high priority channel performance by applying payload reduction techniques to low priority HARQ-ACK bits. This involves removing redundant information through CBG level compression and CBG to TB level bundling, keeping only the critical feedback bits that impact high priority transmission performance.
Solution Approach 2:
The patent applies different quality levels to different HARQ-ACK bits based on their priority. High priority HARQ-ACK bits maintain full payload quality for complete feedback, while low priority HARQ-ACK bits apply reduced quality through payload reduction techniques. This local differentiation optimizes resource allocation by providing maximum feedback quality where most needed and reduced quality where less critical.
2Productivity
If HARQ-ACK payload is reduced through compression and bundling, then resource utilization improves, but feedback information completeness may be compromised
Solution Approach 1:
The patent segments HARQ-ACK feedback into different components based on priority levels and transmission requirements. By dividing the feedback into high priority and low priority portions, and further segmenting low priority feedback into compressible and non-compressible parts, the system can selectively reduce payload while preserving critical information that affects high priority channel performance.
Solution Approach 2:
The patent applies partial payload reduction to low priority HARQ-ACK bits, reducing the payload only to the extent necessary to improve resource utilization while maintaining sufficient feedback information. The reduction is calibrated to provide just enough information for effective high priority channel operation without over-reducing and losing critical feedback data.
3Quantity of substance
If CBG level compression and CBG to TB level bundling are applied, then payload size decreases, but processing complexity increases
Solution Approach 1:
The patent performs payload reduction operations in advance during the preparation phase before transmission. By pre-compressing low priority HARQ-ACK bits through CBG level compression and CBG to TB level bundling operations before the actual transmission occurs, the system reduces the burden on real-time processing and simplifies the transmission phase operations.
Data Source
AI summary
A user equipment (UE) is described. The UE includes a processor configured to determine a configured hybrid automatic repeat request-acknowledgement (HARQ-ACK) payload reduction for multiplexing HARQ-ACK with different priorities on a physical uplink shared channel (PUSCH). The processor is also configured to multiplex the HARQ-ACK with different priorities on the PUSCH based on the configured HARQ-ACK payload reduction. The UE also includes transmitting circuitry configured to transmit the multiplexed HARQ-ACK on the PUSCH.