Blind Retransmission Configuration for NTN Without HARQ Feedback
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Solution Overview
Problem
In Non-Terrestrial Networks (NTN), the large communication delay due to satellite positioning prohibits Hybrid Automatic Repeat Request (HARQ) feedback, leading to inefficiencies in determining the need for retransmission of information.
Innovation Solution
Implementing a blind retransmission method and apparatus that allows terminals and base stations to perform automatic retransmissions based on configuration information, without waiting for HARQ feedback, ensuring information delivery even in the absence of feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback is used for retransmission determination, then communication reliability is improved, but communication delay increases due to satellite positioning in NTN
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple HARQ process IDs and retransmission parameters before communication occurs. The terminal device is pre-configured with a set of HARQ process IDs and retransmission parameters, allowing it to perform blind retransmission without waiting for feedback, thus resolving the delay issue while maintaining reliability through pre-planned retransmission strategies.
2Loss of time
If blind retransmission is performed without HARQ feedback, then communication delay is reduced, but resource usage efficiency deteriorates
Solution Approach 1:
The patent applies partial or excessive action by performing retransmission only when necessary based on pre-configured parameters. The terminal device uses pre-configured HARQ process IDs and retransmission parameters to determine whether retransmission is needed, avoiding unnecessary retransmissions and optimizing resource usage while still reducing delay compared to traditional HARQ feedback methods.
3Loss of time
If HARQ feedback is prohibited in NTN, then communication delay is reduced, but information delivery reliability deteriorates
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously perform blind retransmission using pre-configured parameters. The terminal device independently determines whether retransmission is needed and executes retransmission without requiring feedback from the network side, thus resolving the delay issue while maintaining information delivery reliability through autonomous error handling.
Data Source
AI summary
A blind retransmission method and apparatus, and a blind retransmission indication method and apparatus are provided. The blind retransmission method may include: receiving configuration information of blind retransmission sent by a base station; performing blind retransmission communication with the base station according to the configuration information. According to the present application, the terminal can perform blind retransmission communication with the base station according to the configuration information.