DRB Remapping Sequence Integrity in 5G Data Transmission
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Solution Overview
Problem
In 5G communication, during DRB remapping events, data packets cannot be immediately switched from the original DRB to the target DRB, leading to reduced communication quality due to non-sequential data transmission by some DRBs, which do not support sequential data transmission, causing delays and sequence disruptions.
Innovation Solution
A method to determine if the target DRB supports sequential data transmission, and if not, transmit data packets already delivered to the original DRB through it while sending undelivered packets through the target DRB, ensuring timely DRB switching and maintaining communication quality, or transmit in a sequence-preserving mode if the target DRB supports sequential data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data packets are transmitted through different DRBs during remapping, then communication flexibility is improved, but data packet sequence integrity deteriorates
Solution Approach 1:
The patent applies preliminary action by having the terminal store buffered data packets before DRB remapping occurs. When remapping is triggered, the terminal temporarily holds the original DRB and continues transmitting buffered packets through it, ensuring sequence integrity before switching to the target DRB. This advance preparation resolves the contradiction by maintaining packet order while enabling flexible remapping.
Solution Approach 2:
The patent introduces a buffering mechanism as an intermediary between the SDAP layer and DRB transmission. This buffer acts as a mediator that temporarily holds data packets, allowing the system to switch DRBs without losing packet sequence integrity. The buffer mediates the transition between original and target DRBs, resolving the contradiction between remapping flexibility and sequence stability.
2Stability of the object's composition
If all data packets are transmitted through the original DRB before switching, then data packet sequence integrity is improved, but transmission speed deteriorates
Solution Approach 1:
The patent applies partial action by transmitting only the buffered data packets through the original DRB rather than all data packets. Once the buffer is emptied, the terminal switches to the target DRB for subsequent packets. This partial transmission approach resolves the contradiction by maintaining sequence integrity for critical packets while enabling speed improvement for the majority of data transmission.
Solution Approach 2:
The patent segments the data transmission process into two phases: a first phase where buffered packets are transmitted through the original DRB to maintain sequence integrity, and a second phase where new packets are transmitted through the target DRB to improve speed. This segmentation resolves the contradiction by applying different transmission strategies to different packet groups.
3Stability of the object's composition
If DRB switching is delayed to maintain sequence, then data packet sequence integrity is improved, but communication quality deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-buffering data packets before DRB remapping is triggered. This allows the terminal to immediately switch to the target DRB after the buffer is emptied, rather than delaying the switching decision. The advance buffering resolves the contradiction by enabling quick remapping response while maintaining packet sequence through the buffered portion.
Solution Approach 2:
The terminal autonomously manages the DRB switching process by monitoring its own buffer status and triggering remapping when appropriate. This self-service approach allows the terminal to optimize the switching timing based on its own transmission state, resolving the contradiction between sequence integrity and communication quality without external intervention delays.
Data Source
AI summary
A data transmission method comprises: determining whether a switched target Data Radio Bearer (DRB) supports sequential data transmission or not, when a DRB remapping event is detected during a data transmission process of a target data stream; in case that transmitting, through an original DRB, data packets in the target data stream that have been delivered to the original DRB, and transmitting, through the target DRB, data packets in the target data stream that have not been delivered to the original DRB, in case that the target DRB does not support sequential data transmission; and in case that transmitting data packets in the target data stream in a transmission mode in which sequence of data packets is not changed, in case that the target DRB supports sequential data transmission.