Sidelink HARQ Feedback Configuration for QoS-Based Data Transmission
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Solution Overview
Problem
The LTE sidelink lacks a hybrid automatic repeat request (HARQ) feedback mechanism, leading to low data transmission quality and efficiency, while the NR sidelink's single feedback type results in inefficient HARQ feedback.
Innovation Solution
Configuring HARQ feedback type information based on service quality of service (QoS) parameters and/or group information to enable flexible feedback types for data transmission between terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single HARQ feedback type is configured in NR sidelink, then device complexity is reduced, but feedback efficiency and data transmission quality deteriorate
Solution Approach 1:
The patent implements dynamic HARQ feedback type selection where the feedback type is not fixed but can be changed based on service requirements. The network device configures multiple HARQ feedback types and the terminal device selects appropriate types dynamically based on QoS parameters and service characteristics, making the system adaptable to different transmission scenarios.
Solution Approach 2:
The patent changes the parameter of feedback type from a single fixed value to multiple configurable values. By introducing multiple HARQ feedback types with different characteristics (such as different timing, different acknowledgment modes), the system can adjust the feedback mechanism parameters to match different service requirements, thereby improving transmission efficiency without excessive complexity.
2Reliability
If multiple HARQ feedback types are configured based on QoS parameters, then data transmission quality improves, but device complexity increases
Solution Approach 1:
The patent uses QoS parameters as feedback to determine the appropriate HARQ feedback type. The terminal device evaluates service QoS requirements and provides feedback to select the most suitable HARQ configuration, creating a closed-loop system that adapts to changing transmission conditions while maintaining manageable complexity through rule-based selection.
Solution Approach 2:
The network device performs preliminary configuration by pre-defining multiple HARQ feedback types with different characteristics. This preliminary action allows the terminal device to simply select from pre-configured options based on QoS parameters, rather than creating complex feedback mechanisms in real-time, thus improving reliability while controlling complexity.
3Device complexity
If LTE sidelink uses broadcast services without HARQ feedback, then device complexity is low, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments the HARQ feedback mechanism into different types suitable for different service scenarios. Instead of using a single unified feedback mechanism or no feedback, the system divides feedback approaches into multiple categories (such as immediate acknowledgment, delayed acknowledgment, selective acknowledgment) that can be applied based on specific transmission requirements, thereby improving efficiency without uniformly increasing complexity.
Data Source
AI summary
A data transmission method, a device, and a medium are disclosed. The data transmission method includes: determining hybrid automatic repeat request HARQ feedback type configuration information of a sending terminal device, where the HARQ feedback type configuration information is configured based on service information of a service, and the service information includes a quality of service QoS parameter of the service and/or group information of the service; and sending a data packet to a receiving terminal device based on the HARQ feedback type configuration information.