HARQ-ACK Codebook Segmentation for 5G Uplink Control
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficiently configuring HARQ-ACK feedback mechanisms to support diverse services such as eMBB, mMTC, and URLLC, requiring improved resource management and control to ensure high data rates, massive machine-type communications, and ultra-low latency.
Innovation Solution
A method and apparatus for configuring HARQ-ACK codebooks in a terminal and base station, allowing for separate or joint feedback of acknowledgement/negative acknowledgement (ACK/NACK) information, where HARQ-ACK codebooks are generated and concatenated to optimize feedback transmission in the physical uplink control channel (PUCCH), enabling efficient resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HARQ-ACK feedback is configured for multiple PDSCHs corresponding to different CORESETs, then the coverage of supported services is improved, but the complexity of feedback configuration and processing increases
Solution Approach 1:
The patent segments the HARQ-ACK feedback mechanism by introducing separate codebooks (first HARQ-ACK codebook and second HARQ-ACK codebook) for different CORESETs. Each codebook handles feedback for specific PDSCHs associated with particular CORESETs, allowing independent management and processing of feedback for different service types, thus reducing overall configuration complexity while maintaining versatile service support
Solution Approach 2:
The patent introduces a new dimension of organization by associating HARQ-ACK codebooks with specific CORESET indexes. This dimensional approach allows the system to manage multiple feedback streams simultaneously by distinguishing them through CORESET identifiers, enabling scalable support for diverse services without linearly increasing processing complexity
2Object-affected harmful factors
If separate HARQ-ACK codebooks are generated for different CORESETs, then interference management is improved, but the processing overhead increases
Solution Approach 1:
By segmenting HARQ-ACK feedback into separate codebooks for different CORESETs, the patent isolates interference between different feedback streams. Each codebook processes feedback for specific PDSCHs with distinct interference characteristics, preventing interference propagation across different service types while maintaining efficient processing through dedicated codebook structures
Solution Approach 2:
The patent applies local quality by optimizing each HARQ-ACK codebook specifically for its associated CORESET and PDSCH characteristics. Each codebook can be tailored with appropriate size, timing, and resource allocation suited to its specific service requirements, improving interference management through localized optimization rather than uniform processing
3Productivity
If joint feedback is configured by concatenating multiple HARQ-ACK codebooks, then feedback efficiency is improved, but the uplink resource requirements increase
Solution Approach 1:
The patent merges multiple HARQ-ACK codebooks into a single joint feedback message through concatenation. This combining approach consolidates feedback for multiple PDSCHs and CORESETs into one uplink transmission, improving feedback efficiency by reducing the number of separate transmissions required while managing uplink resource usage through unified resource allocation
Data Source
AI summary
The disclosure relates to a communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology. The disclosure is applicable to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology. An operation method of a terminal for receiving data from multiple Transmission and Reception Points (TRPs) participated in non-coherent joint transmission is disclosed. The method includes receiving information on HARQ-ACK codebook configuration and configuring and transmitting HARQ-ACK codebooks corresponding to the multiple TRPs based on the received information.