PUCCH Carrier Switching Across Multiple HARQ-ACK Codebooks
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing physical uplink control channel (PUCCH) carrier switching for hybrid automatic repeat request acknowledgement (HARQ-ACK) codebooks, which can lead to suboptimal performance in handling HARQ feedback.
Innovation Solution
Implementing a configuration and indication mechanism for PUCCH carrier switching with multiple HARQ-ACK codebooks, enabling dynamic or semi-static switching based on specific HARQ-ACK codebooks to optimize HARQ feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUCCH carrier switching is implemented for HARQ-ACK codebooks, then HARQ feedback transmission flexibility is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic PUCCH carrier switching for HARQ-ACK codebooks, where the system can adaptively select different PUCCH carriers based on current communication conditions. The switching mechanism allows the UE to dynamically change the PUCCH carrier used for HARQ feedback transmission, improving flexibility while managing complexity through structured switching rules and configurations.
Solution Approach 2:
The patent segments the HARQ-ACK codebook into multiple parts and associates each part with specific PUCCH carriers. This segmentation allows independent handling of different codebook portions on different carriers, enabling flexible switching without requiring complete reconfiguration of the entire HARQ feedback mechanism, thus managing system complexity.
2Reliability
If multiple HARQ-ACK codebooks are configured with PUCCH carrier switching, then communication performance is improved, but configuration and management difficulty increases
Solution Approach 1:
The patent applies different PUCCH carrier switching configurations to different HARQ-ACK codebook parts based on their specific requirements. Each codebook part can have tailored switching parameters, carrier associations, and activation conditions, allowing optimized communication performance for each codebook while maintaining manageable configuration through localized settings rather than global uniformity.
3Productivity
If dynamic PUCCH carrier switching is enabled, then resource utilization is improved, but processing overhead increases
Solution Approach 1:
The patent performs preliminary configuration of PUCCH carrier switching parameters, carrier associations, and codebook part mappings before actual HARQ feedback transmission. The network configures switching rules, active carrier sets, and codebook-part-to-carrier mappings in advance, reducing real-time processing overhead during actual feedback transmission while still enabling dynamic resource utilization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook and a second HARQ-ACK codebook, wherein the configuration indicates that physical uplink control channel (PUCCH) carrier switching is enabled for at least one of the first HARQ-ACK codebook or the second HARQ-ACK codebook. The UE may receive an indication of a PUCCH carrier switch for the at least one of the first HARQ-ACK codebook or the second HARQ-ACK codebook. The UE may receive a downlink communication associated with the at least one of the first HARQ-ACK codebook or the second HARQ-ACK codebook. The UE may transmit HARQ feedback a target PUCCH carrier based at least in part on the indication of the PUCCH carrier switch. Numerous other aspects are described.