Consolidating HARQ Feedback in Downlink Control Signaling
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR networks, the traditional method of using separate scheduling signaling for HARQ feedback information is inefficient, leading to high signaling overhead and reliability issues, especially in unlicensed spectrum scenarios where channel occupancy is uncertain.
Innovation Solution
The method involves transmitting downlink HARQ feedback information for multiple terminals through target downlink control signaling, where the base station determines and configures the HARQ configuration information to carry feedback for multiple terminals, reducing the need for individual scheduling signaling and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate scheduling signaling is used to carry each HARQ feedback information, then the reliability of feedback transmission is improved, but the signaling overhead increases
Solution Approach 1:
The patent combines multiple HARQ feedback information into a single downlink control signaling message. Instead of sending separate scheduling signaling for each terminal's HARQ feedback, the base station aggregates feedback for multiple terminals (first terminal and second terminal) into one unified control signaling, thereby reducing signaling overhead while maintaining feedback reliability
Solution Approach 2:
The downlink control signaling is designed to serve multiple functions simultaneously: it carries HARQ feedback information for multiple different terminals (first terminal and second terminal) within a single message structure, making the signaling mechanism universal and multi-functional rather than dedicated to a single terminal
2Reliability
If separate scheduling signaling is used for each HARQ feedback, then the feedback can be transmitted reliably, but the system resource consumption increases
Solution Approach 1:
The patent merges the transmission of HARQ feedback for multiple terminals into a single downlink control signaling event. This consolidation reduces the total number of signaling transmissions required, thereby decreasing system resource consumption including energy, processing overhead, and radio interface resources, while still delivering reliable feedback to each terminal
3Measurement precision
If multiple separate scheduling signaling are used for multiple terminals, then each terminal receives its feedback accurately, but the complexity of the signaling system increases
Solution Approach 1:
The patent segments the downlink control signaling into distinct parts or fields, each dedicated to a specific terminal's HARQ feedback information. This segmentation allows each terminal to accurately identify and extract its own feedback from the aggregated message, maintaining feedback accuracy while managing system complexity through structured organization rather than multiple separate messages
Solution Approach 2:
The downlink control signaling structure is designed with multi-functionality to handle feedback for multiple terminals simultaneously. By creating a universal message format that can accommodate different terminals' feedback through standardized segmentation and identification mechanisms, the system reduces complexity compared to maintaining separate dedicated signaling paths for each terminal
Data Source
AI summary
The present disclosure provides methods and apparatuses for transmitting HARQ feedback information, base stations and terminals. The method includes: determining downlink Hybrid Automatic Repeat reQuest (HARQ) configuration information, where the downlink HARQ configuration information informs at least two preset terminals about transmission configuration information of target downlink control signaling; sending the downlink HARQ configuration information to each of the preset terminals; loading the downlink HARQ feedback information for each of the preset terminals into the target downlink control signaling according to the downlink HARQ configuration information; and sending the target downlink control signaling to each of the preset terminals. In the present disclosure, the base station transmits HARQ feedback information with respect to uplink data transmission from a plurality of terminals through the target downlink control signaling, which saves system signaling overhead.