Media Transmission Path Management for Low Latency Services
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Solution Overview
Problem
Existing methods for establishing media transmission paths fail to meet the low delay requirements of delay-sensitive services, such as virtual reality (VR) or augmented reality (AR) communication, which necessitate delays of less than 20 ms, severely impacting user experience.
Innovation Solution
A method and system that manage media transmission paths by selecting the application function user plane edge device with the minimum transmission delay based on terminal location, establishing multiple media transmission paths, and dynamically switching to maintain low latency when the terminal's location changes, ensuring optimal delay performance for delay-sensitive services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing methods for establishing media transmission path are used, then the system is simple to operate, but the transmission delay exceeds the requirement for delay sensitive services
Solution Approach 1:
The system pre-establishes multiple media transmission paths between the application function user plane anchor device and different application function user plane edge devices before actual media transmission begins. When a terminal connects, the system can immediately select from these pre-established paths based on terminal location, avoiding the time-consuming process of establishing a new path during active transmission and thus reducing transmission delay.
Solution Approach 2:
The system dynamically selects and switches between different pre-established media transmission paths based on real-time terminal location information. When the terminal moves to a different location, the application function control plane device receives location information and switches the media transmission path to one that routes through the nearest application function user plane edge device, thereby adapting to changing conditions and minimizing transmission delay.
2Loss of time
If multiple media transmission paths are established to reduce delay, then transmission delay is reduced, but the complexity of managing these paths increases
Solution Approach 1:
The application function control plane device continuously receives terminal location information from the terminal or network elements. Based on this feedback, the device automatically determines the optimal media transmission path by identifying which application function user plane edge device is nearest to the terminal's current location, and switches paths accordingly. This automated feedback-driven approach simplifies operation compared to manual path management.
Solution Approach 2:
The system performs automatic path selection and switching without requiring manual intervention. The application function control plane device autonomously receives terminal location information, calculates the optimal path based on terminal location and pre-established paths, and executes the path switch. This self-service capability reduces operational complexity despite managing multiple transmission paths.
Data Source
AI summary
A method for managing a media transmission path includes: obtaining location information of a terminal; determining an application function user plane anchor device corresponding to the terminal, and an application function user plane edge device that has a minimum transmission delay, where the transmission delay is between the application function user plane edge device and the terminal; establishing media transmission paths between the application function user plane anchor device and the application function user plane edge device, and between the application function user plane edge device and the terminal; selecting a new application function user plane edge device when a location of the terminal changes; and handing over the terminal to the new application function user plane edge device. This method reduces a delay of a media transmission path, and can better meet a requirement of a delay sensitive service.