Type-1 HARQ-ACK Codebook for Multi-PDSCH Timing in 5G
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmissions for multiple physical downlink shared channels, particularly in 5G systems with diverse service requirements such as enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliability low-latency communication (URLLC), which require optimized resource allocation and timing configurations.
Innovation Solution
A method and device for HARQ-ACK transmission that involves receiving and transmitting Type-1 HARQ-ACK codebooks based on extended slot timing values, using time domain resource allocation (TDRA) tables, and considering uplink and downlink subcarrier spacing configurations to efficiently manage HARQ-ACKs for multiple physical downlink shared channels (PDSCHs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PDSCHs are received via single DCI in 5G systems, then service diversity (eMBB, mMTC, URLLC) is supported, but HARQ-ACK transmission management becomes complex
Solution Approach 1:
The patent segments the HARQ-ACK codebook into multiple parts, each corresponding to different PDSCH reception occasions. By dividing the acknowledgment feedback into separate codebook parts, the system manages complex HARQ-ACK transmissions for multiple PDSCHs received via single DCI, reducing the complexity of transmitting and managing acknowledgments for diverse 5G services.
2Adaptability or versatility
If extended slot timing values are used for HARQ-ACK transmission, then timing flexibility is improved, but resource allocation complexity increases
Solution Approach 1:
The patent introduces dynamic slot timing values (K1) for HARQ-ACK transmission, allowing the timing between PDSCH reception and HARQ-ACK transmission to be flexibly adjusted based on service requirements. This dynamic timing mechanism provides adaptability for different 5G services (eMBB, mMTC, URLLC) while managing resource allocation through configured timing relationships.
3Reliability
If Type-1 HARQ-ACK codebook is transmitted for multiple PDSCHs, then acknowledgment coverage is improved, but transmission overhead increases
Solution Approach 1:
The patent combines multiple HARQ-ACK acknowledgments for different PDSCHs into a single Type-1 HARQ-ACK codebook transmission. By merging multiple acknowledgment bits into one consolidated codebook, the system improves acknowledgment coverage for multiple downlink shared channels while managing transmission overhead through efficient codebook structure and multiplexing.
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of things (IoT). A method for generating a Type-1 hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook by gathering HARQ-ACK information of multiple PDSCHs when a terminal is scheduled with the multiple physical downlink shared channels (PDSCHs) from one piece of downlink control information (DCI) in a wireless communication system is provided. The terminal may be configured with an uplink cell and a downlink cell having different subcarrier spacings, and may generate the Type-1 HARQ-ACK codebook, based on the subcarrier spacings.