Scheduled-Data HARQ Feedback Selection to Avoid Satellite Link Blocking
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Solution Overview
Problem
In communication scenarios with long signal transmission distances, such as satellite-ground communication, hybrid automatic repeat request (HARQ) blocking occurs, leading to reduced transmission rates for terminal devices due to excessive HARQ processes.
Innovation Solution
A method and device for processing HARQ feedback that allows terminal devices to determine whether scheduled data supports the HARQ feedback function based on control commands, enabling or disabling the HARQ feedback function accordingly to prevent blocking and improve data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback function is enabled for all scheduled data in long-distance communication, then transmission reliability is improved, but HARQ blocking occurs and transmission rate decreases
Solution Approach 1:
The patent applies local quality by enabling HARQ feedback function selectively for specific scheduled data rather than uniformly for all data. The terminal device determines whether to enable HARQ feedback based on specific conditions or data types, allowing different parts of the data transmission to have different reliability mechanisms applied, thus avoiding HARQ blocking while maintaining reliability where needed.
Solution Approach 2:
The patent implements dynamics by making the HARQ feedback function configurable and adaptable. The terminal device can dynamically determine whether to enable HARQ feedback based on the characteristics of scheduled data and communication conditions, allowing the system to flexibly adjust between reliability and transmission rate requirements rather than being fixed in one mode.
2Productivity
If HARQ feedback function is enabled for scheduled data, then data transmission efficiency is improved, but HARQ blocking occurs due to excessive HARQ processes
Solution Approach 1:
The patent extracts the HARQ feedback function from being a mandatory universal feature and makes it optional and selective. By determining whether to enable HARQ feedback on a per-scheduled-data basis, the system removes unnecessary HARQ processes that would contribute to blocking and complexity, keeping only the essential feedback mechanisms needed for specific data types or conditions.
3Reliability
If HARQ feedback is processed for all data in satellite-ground communication, then communication reliability is improved, but transmission delay increases
Solution Approach 1:
The patent applies local quality by enabling HARQ feedback selectively for specific scheduled data in satellite-ground communication rather than for all data. This selective approach maintains communication reliability for critical data while avoiding unnecessary feedback processing that would increase transmission delay for other data types.
Solution Approach 2:
The patent implements partial action by applying HARQ feedback only to the extent necessary for maintaining communication reliability. Rather than processing HARQ feedback for all data (excessive action), the system determines the minimum necessary feedback processing based on scheduled data characteristics, thus reducing transmission delay while maintaining adequate reliability.
Data Source
AI summary
A method for processing hybrid automatic repeat request (HARQ) feedback is performed by a terminal device, and includes: receiving a control command transmitted by a network side device; and determining whether scheduled data supports a HARQ feedback function.