HARQ-ACK Resource Determination for 5G PUCCH Efficiency
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Solution Overview
Problem
Current 5G communication systems face challenges in efficiently transmitting hybrid automatic retransmission request acknowledgement (HARQ-ACK) feedback information, particularly for physical downlink shared channels (PDSCH), which affects communication efficiency and resource utilization.
Innovation Solution
A method where user equipment determines resources for transmitting HARQ-ACK information based on control information, allowing for the bundling and transmission of HARQ-ACK for multiple pieces of downlink data on a second resource or resource pair, optimizing the use of PUCCH resources by using predetermined rules or dynamic selection from a set of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK information for multiple pieces of downlink data is transmitted separately on individual resources, then transmission accuracy is improved, but PUCCH resource consumption increases
Solution Approach 1:
The patent combines multiple HARQ-ACK information bits into a single bundled transmission unit. Instead of transmitting separate HARQ-ACK feedback for each downlink data piece on individual PUCCH resources, the method bundles these acknowledgments together and transmits them on a single determined PUCCH resource, thereby reducing resource consumption while maintaining reliable feedback transmission.
Solution Approach 2:
The determined PUCCH resource serves multiple functions: it carries bundled HARQ-ACK information for multiple different downlink data pieces simultaneously. This single resource performs what would otherwise require multiple separate resources, achieving resource efficiency while maintaining the ability to provide feedback for all received downlink transmissions.
2Productivity
If HARQ-ACK information is bundled and transmitted on a single resource, then PUCCH resource utilization is improved, but transmission reliability may deteriorate
Solution Approach 1:
The patent performs preliminary bundling of multiple HARQ-ACK information bits into a single feedback unit before transmission. This preprocessing step consolidates the acknowledgment data, allowing the system to transmit comprehensive feedback for multiple downlink pieces on one resource while maintaining the integrity and reliability of the feedback information through structured bundling operations.
3Speed
If separate resources are allocated for each HARQ-ACK transmission, then transmission speed is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic resource determination where the PUCCH resource for bundled HARQ-ACK transmission is selected based on real-time conditions including the number of downlink pieces received and their timing characteristics. This dynamic approach allows the system to adapt resource allocation to actual needs, maintaining fast feedback performance while avoiding the complexity of pre-configuring separate resources for every possible downlink scenario.
Data Source
AI summary
A method and device for transmitting hybrid automatic retransmission request acknowledgement (HARQ-ACK) information are provided. The method includes receiving control information from a base station, receiving a plurality of pieces of downlink data from the base station, based on the control information, determining, for the plurality of pieces of downlink data, a resource for transmitting HARQ-ACK information, based on the control information, and transmitting the HARQ-ACK information to the base station on the determined resource, wherein determining the resource for transmitting the HARQ-ACK information includes determining, for each of the plurality of pieces of downlink data, a first resource or resource pair for transmitting the HARQ-ACK information, or determining, for the plurality of pieces of downlink data, a second resource or resource pair for transmitting the HARQ-ACK information.