Downlink Data Disorder Control via Path Switching End Markers
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Solution Overview
Problem
In mobile communications, data transmission path switching between a terminal and a data network can result in downlink data packet disorder due to the inability of path aggregation network elements to distinguish the sending sequence of data on multiple paths, leading to reduced user experience.
Innovation Solution
A method where a control plane network element sends indication information to a path aggregation network element to ensure that downlink data from one path is completed before sending data from another path, using end markers to synchronize data transmission and prevent packet disorder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data transmission path switching is performed, then network adaptability is improved, but downlink data packet order is disrupted
Solution Approach 1:
The control plane network element sends indication information to the path aggregation network element in advance, specifying the sending sequence of downlink data from different transmission paths. This preliminary instruction enables the path aggregation network element to pre-establish the correct forwarding order, ensuring data packets arrive in the proper sequence even as transmission paths switch, thus resolving the contradiction between path adaptability and data order reliability
Solution Approach 2:
The system implements a feedback mechanism where the control plane network element monitors transmission path status and dynamically adjusts the indication information sent to the path aggregation network element. This feedback loop ensures that path switching decisions consider the impact on data packet ordering, allowing the system to adapt to network conditions while maintaining reliable data delivery sequences
2Productivity
If path aggregation network element receives data from multiple paths simultaneously, then transmission efficiency is improved, but data sequence distinction capability deteriorates
Solution Approach 1:
The control plane network element acts as an intermediary that receives data from multiple transmission paths and coordinates their delivery through indication information. This intermediary establishes a control mechanism that tracks the sending sequence of data from different paths, enabling the path aggregation network element to efficiently process multi-path data while maintaining accurate sequence distinction through the intermediary's coordination
Solution Approach 2:
The system segments the data transmission control by separating the path selection function (performed by control plane network element) from the data forwarding function (performed by path aggregation network element). This segmentation allows the control plane to manage sequence information for multiple paths independently, enabling efficient parallel data reception while maintaining distinguishable sequence control for each path segment
Data Source
AI summary
This application provides a method for controlling disorder of downlink data and an apparatus thereof. The method includes: A control plane network element determines to switch from a first user plane device to a second user plane device, and sends indication information to the second user plane device. The second user plane device buffers, according to the received indication information, downlink data received from a session anchor, and sends the buffered downlink data after reception of an end marker from the first user plane device.