Session Management Network Element Transport Capability Selection
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Solution Overview
Problem
Current solutions for implementing high-reliability transmission in 5G networks, such as those required for URLLC services, face challenges in selecting the appropriate transmission method between GTP-U enhanced protocol and transport layer redundancy, leading to potential degradation in user service experience due to unsupported protocols in RAN or UPF nodes.
Innovation Solution
A method is introduced where a session management network element obtains transport network capability list information to determine if high-reliability transmission is supported, and based on this, manages user plane connections by selecting either GTP-U enhanced protocol or transport layer redundancy, ensuring reliable transmission by matching network capabilities with available protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GTP-U enhanced protocol is used for high-reliability transmission, then transmission reliability is improved, but compatibility with existing RAN and UPF nodes is worsened due to protocol support requirements
Solution Approach 1:
The system dynamically selects between GTP-U enhanced protocol and transport layer redundancy based on real-time network capability assessments. Network elements report their protocol support capabilities, and the session management network element adapts the transmission method accordingly, allowing the system to switch between high-reliability mode and compatibility mode as needed
Solution Approach 2:
The invention changes the operational parameters of the transmission system by introducing capability indication parameters that report whether network elements support GTP-U enhanced protocol. Based on these parameter values, the system adjusts its transmission approach, using GTP-U when capabilities indicate support and transport layer redundancy when capabilities indicate lack of support
2Adaptability or versatility
If transport layer redundancy is used for high-reliability transmission, then compatibility with existing network elements is improved, but transmission reliability is worsened compared to GTP-U enhanced protocol
Solution Approach 1:
The system performs beforehand cushioning by assessing network element capabilities in advance before establishing high-reliability transmission. The session management network element receives capability indications from RAN and UPF nodes, and based on these advance assessments, selects the appropriate transmission method to cushion against potential reliability issues that would arise from using an unsupported protocol
3Reliability
If network capability assessment is performed before selecting transmission method, then transmission reliability is improved by matching capabilities with protocols, but system complexity is worsened due to additional capability management
Solution Approach 1:
Network elements perform self-service by autonomously reporting their own protocol support capabilities to the session management network element. Each element assesses its own capabilities and communicates this information without requiring complex external verification mechanisms, simplifying the overall capability management process while ensuring accurate capability matching for reliable transmission
Data Source
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AI summary
Embodiments of this application relate to the field of communications technologies, and provide a transmission method and apparatus, to improve transmission reliability of a service flow packet of a terminal. The method includes: obtaining, by a session management network element, transport network capability list information, where the transport network capability list information indicates whether a transport network supports high-reliability transmission, and the transport network is a network between an access device and a user plane network element; and managing, by the session management network element, a user plane connection, of a terminal, between the access device and the user plane network element based on the transport network capability list information, where the user plane connection is usable for transmitting a service flow packet of the terminal.