5G Data Delivery Status Indication via Sequence Number Segmentation
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Solution Overview
Problem
In 5G communication systems, accurate flow control is hindered by the lack of efficient data delivery status indication, leading to redundant data transmission and resource wastage due to incomplete information about data sequence numbers (SNs) successfully or unsuccessfully delivered to terminal devices.
Innovation Solution
A method where a first network node sends first and second indication information to a second network node, indicating the highest sequence number SN successfully delivered and SNs delivered after the highest SN, allowing the second network node to determine successfully and unsuccessfully delivered packets, thereby enabling precise flow control and reducing redundant data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the highest sequence number SN successfully delivered is indicated, then the indication information is simple, but the second network node cannot accurately determine unsuccessfully delivered packets
Solution Approach 1:
The indication information is segmented into two parts: first indication information indicating the highest successfully delivered SN, and second indication information indicating the SN delivered after the highest successfully delivered SN. This segmentation allows the second network node to accurately determine delivery status without requiring complex indication structures.
Solution Approach 2:
The second indication information acts as an intermediary element that provides the additional SN information needed for accurate delivery status determination. This intermediary field enables the second network node to identify unsuccessfully delivered packets by comparing the highest successfully delivered SN with the subsequent SN.
2Measurement precision
If complete delivery status information is transmitted, then flow control accuracy is improved, but transmission resources are wasted
Solution Approach 1:
Only the essential information needed for flow control is extracted and transmitted: the highest successfully delivered SN and the subsequent SN. This extraction avoids transmitting unnecessary complete delivery status information while maintaining sufficient accuracy for flow control decisions.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary portion of delivery status information (the highest SN and the next SN) rather than complete delivery status of all packets. This partial information is sufficient for accurate flow control without the resource waste of transmitting full delivery status.
3Reliability
If redundant data is transmitted to ensure high-reliability low-latency service, then service performance is improved, but transmission efficiency decreases
Solution Approach 1:
The first network node provides feedback information (highest successfully delivered SN and subsequent SN) to the second network node. This feedback enables the second network node to accurately determine which packets were successfully delivered and which need retransmission, allowing efficient resource utilization while maintaining service reliability.
Solution Approach 2:
The patent changes the parameter of delivery status indication from complete packet-level status to a summarized form (highest SN and subsequent SN). This parameter change maintains the ability to ensure service reliability through accurate retransmission decisions while significantly improving transmission efficiency by reducing unnecessary data transmission.
Data Source
AI summary
This application provides a data delivery status indicating method and an apparatus, to effectively indicate a data delivery status, facilitate more accurate flow control, and save transmission resources. A communication method is provided. The method includes a first network node sends data to a terminal device. The first network node sends first indication information and second indication information to a second network node. The first indication information indicated information about a highest sequence number (SN) successfully delivered in sequence in the data. The second indication information indicates information about an SN that is delivered after the highest SN.