DRB Remapping Completion Indication for 5G Packet Delivery
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Solution Overview
Problem
In 5G data bearer remapping processes, the receiving end may not receive transmission completion indication messages, leading to delayed or indefinite data packet delivery due to errors in the message transmission process.
Innovation Solution
A method and system where the sending end stops delivering data packets to the original DRB and sends them to the target DRB upon detecting a DRB remapping event, and sends a predetermined number of transmission completion indication messages through the original DRB, even if it operates in a non-transmission feedback determination mode, to ensure the receiving end receives the message and continues data packet delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving end waits for transmission completion indication message before performing sequential delivery processing, then data packet delivery order is maintained, but delivery process may be delayed indefinitely if message is lost
Solution Approach 1:
The sending end performs preliminary action by sending a predetermined number of transmission completion indication messages through the original DRB before switching to the target DRB. This ensures that the receiving end receives at least one completion indication message, allowing it to perform sequential delivery processing without indefinite waiting, thus resolving the contradiction between maintaining delivery completeness and avoiding delivery delays
Solution Approach 2:
The transmission completion indication message serves as feedback from the sending end to the receiving end, informing the receiving end that data packets have been successfully transmitted through the original DRB. This feedback mechanism enables the receiving end to switch from waiting mode to active delivery mode, resolving the contradiction by providing reliable completion confirmation while preventing indefinite delays
2Productivity
If transmission completion indication message is sent through original DRB in non-transmission feedback determination mode, then message sending probability is improved, but message transmission reliability may be compromised
Solution Approach 1:
The sending end sends a predetermined number of transmission completion indication messages through the original DRB as a preliminary action before DRB remapping. This preliminary message transmission ensures that at least one message reaches the receiving end even in non-feedback determination mode, improving sending efficiency while maintaining sufficient transmission reliability for the remapping process
Solution Approach 2:
The patent changes the parameter of message transmission by sending a predetermined number of messages instead of a single message. This parameter change increases the probability of successful message delivery through the original DRB, resolving the contradiction between sending efficiency and transmission accuracy in non-feedback determination mode
Data Source
AI summary
A method for data packet processing in a data radio bearer (DRB) remapping process includes: in a data transmission process of a target data stream, when it is detected that a DRB remapping event occurs, stopping delivering data packets of the target data stream to an original DRB, and delivering data packets of the target data stream that are not delivered to the original DRB to a target DRB; and when it is detected that data packets of the target data stream that are delivered to the original DRB are completely sent, if the original DRB is configured to operate in a non-transmission feedback determination mode, sending to a receiving terminal a completion indication message for predetermined times by means of the original DRB. A problem that the receiving terminal cannot further deliver a received data packet and thus a data packet delivery process will be indefinitely delayed can therefore be overcome.