HARQ Feedback Mode Configuration for Wireless Reliability
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Solution Overview
Problem
The existing HARQ feedback mechanism in communication protocols faces challenges in ensuring high reliability and adaptability for diverse and complex transmission services, particularly in achieving high rate, low latency, and high mobility.
Innovation Solution
A Hybrid Automatic Repeat reQuest (HARQ) feedback method and apparatus that pre-configures a terminal with a specific HARQ feedback mode for a first service, allowing the terminal to determine the HARQ feedback mode based on configuration information received from a network device, thereby improving communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing HARQ feedback mechanism is used for diverse transmission services, then the protocol can maintain basic functionality, but communication reliability is insufficient for high rate and low latency services
Solution Approach 1:
The patent applies dynamics by enabling the terminal to dynamically determine HARQ feedback modes based on different service types. The terminal can switch between feedback modes (e.g., ACK/NACK feedback, NACK-only feedback, or no feedback) depending on the service characteristics, allowing the system to adapt to diverse transmission services while maintaining high reliability where needed
Solution Approach 2:
The patent changes the feedback mode parameter based on service type. By configuring different HARQ feedback parameters for different services (e.g., enabling ACK/NACK for high reliability services, NACK-only for latency-sensitive services), the system achieves both high communication reliability and adaptability to diverse transmission requirements
2Reliability
If HARQ feedback information is transmitted for every service, then communication reliability improves, but transmission latency increases
Solution Approach 1:
The patent applies partial action by implementing selective HARQ feedback where the terminal transmits feedback information only when necessary. For certain services, the terminal may send only NACK when decoding fails rather than sending ACK for every successful reception, reducing unnecessary feedback transmissions and lowering latency while maintaining reliability
Solution Approach 2:
The system dynamically adjusts feedback transmission based on service requirements. For latency-sensitive services, the terminal may use NACK-only mode to reduce feedback overhead and latency, while for reliability-critical services, full ACK/NACK feedback is enabled, achieving an optimal balance between reliability and latency
3Adaptability or versatility
If the terminal autonomously determines HARQ feedback mode, then adaptability to different services improves, but control over communication reliability decreases
Solution Approach 1:
The patent implements a feedback mechanism where the network device receives HARQ feedback from the terminal and uses this information to control retransmissions. The network device can adjust transmission parameters based on the feedback received, maintaining reliability control while allowing the terminal autonomy in feedback mode determination
Solution Approach 2:
The network device acts as an intermediary that coordinates between terminal autonomy and reliability control. The terminal autonomously determines feedback modes based on service types, while the network device maintains overall control by receiving feedback information and coordinating retransmissions, ensuring communication reliability is maintained across diverse services
Data Source
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AI summary
The embodiments of the present disclosure provide a Hybrid Automatic Repeat reQuest (HARQ) feedback method and apparatus, a terminal, and a network device. The method includes: obtaining, by a terminal, first configuration information; and determining, by the terminal, a HARQ feedback mode for a first service based on the first configuration information. Therefore, it facilitates configuration of the HARQ feedback mode for the first service for the terminal. In addition, since the terminal can feed back HARQ feedback information for the first service to the network device using the HARQ feedback mode for the first service, such that the network device can perform related operations such as retransmission subsequently, it is advantageous in improving communication reliability of the transmission of the first service between the network device and the terminal.