Radio Frequency Unit Data Retransmission for Lower Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current data retransmission mechanisms in wireless communication cause high latency, which adversely affects low-latency services.
Innovation Solution
The method involves the radio frequency unit determining the transmission status of downlink data based on feedback from the terminal device and directly sending retransmitted data, bypassing the need for the distributed unit to make this determination, thereby reducing overall latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distributed unit determines data transmission status and initiates retransmission, then data reliability is improved, but retransmission latency increases
Solution Approach 1:
The patent extracts the data retransmission determination function from the distributed unit and relocates it to the radio frequency unit. The radio frequency unit now directly determines transmission status based on feedback information and initiates retransmission without needing to consult the distributed unit, thereby reducing the decision-making time and overall latency while maintaining reliability
Solution Approach 2:
The patent implements preliminary action by having the radio frequency unit prepare and execute retransmission decisions immediately upon receiving feedback information. The radio frequency unit proactively determines transmission status and initiates retransmission without waiting for distributed unit instructions, reducing the time delay in the retransmission process
2Speed
If the radio frequency unit processes feedback information and determines retransmission needs, then retransmission speed is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by enabling the radio frequency unit to perform multiple functions: receiving feedback information, determining transmission status, and initiating retransmission. This consolidates functions that were previously distributed between the radio frequency unit and distributed unit, improving retransmission speed while the complexity increase is managed through functional integration rather than adding separate dedicated components
Data Source
AI summary
This application provides a data retransmission method and a communication apparatus. The method is performed by a radio frequency unit side of a network device. The method includes: receiving first feedback information, where the first feedback information is feedback for first downlink data of a terminal device; and when determining, based on the first feedback information, that transmission of the first downlink data fails, sending second downlink data, where the second downlink data is retransmitted data of the first downlink data. In this way, a radio frequency unit of the network device performs a processing process of data retransmission, so that overall latency of a data retransmission process can be reduced.