5G Port Configuration for Time Synchronization via NEF
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Solution Overview
Problem
The existing 5G system lacks an effective method for providing time synchronization services across both Time Sensitive Networking (TSN) and non-TSN environments, particularly in configuring ports to support deterministic communication requirements.
Innovation Solution
A method is introduced where the Network Exposure Function (NEF) performs port configuration using either the Best Master Clock Algorithm (BMCA) scheme or external port configuration scheme, depending on the grandmaster's location, and transmits necessary information through specific signaling containers to ensure time synchronization service exposure across different network environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the 5G system uses a single port configuration scheme, then the system complexity is reduced, but the adaptability to different network environments (TSN and non-TSN) deteriorates
Solution Approach 1:
The patent implements dynamic port configuration schemes that adapt based on the network environment. The system can switch between BMCA scheme (for TSN environments with grandmaster clocks) and external port configuration scheme (for non-TSN environments or when grandmaster is inside 5G system), allowing the 5G system to dynamically adjust its behavior to match the operational context and maintain optimal performance across diverse network types.
2Adaptability or versatility
If the NEF transmits detailed port configuration information to support both TSN and non-TSN environments, then the service coverage is improved, but the information transmission complexity increases
Solution Approach 1:
The patent creates a universal Announce message structure that serves multiple functions across different network environments. This single message format can convey port configuration information suitable for both TSN and non-TSN environments, eliminating the need for separate message types and reducing overall system complexity while maintaining broad service coverage.
Solution Approach 2:
The Network Exposure Function (NEF) acts as an intermediary that translates and adapts port configuration information into a unified Announce message format. The NEF receives configuration data, processes it according to the target environment requirements, and transmits the appropriate information to network entities, thereby simplifying the information transmission process while ensuring compatibility across diverse network types.
3Adaptability or versatility
If the system dynamically selects between BMCA and external port configuration schemes, then the adaptability to different grandmaster locations is improved, but the control logic complexity increases
Solution Approach 1:
The system implements self-service mechanisms where network entities autonomously determine the appropriate port configuration scheme based on their local detection of grandmaster clock locations. Each entity can independently assess whether it is in a TSN environment with an external grandmaster or a non-TSN environment, and automatically select the corresponding configuration scheme without requiring complex centralized control logic.
Data Source
AI summary
Provided are a method for performing port configuration of a 5G system (5GS) for providing a time synchronization service, and a network entity performing the same. A method for performing port configuration may include: when a grandmaster (GM) is determined to be a Time Sensitive Networking (TSN) GM outside the 5GS, performing, by a Network Exposure Function (NEF), port configuration of the 5GS in a Best Master Clock Algorithm (BMCA) scheme; and when the GM is determined to be a 5GS GM inside the 5GS, or the TSN GM outside the 5GS that does not support the BMCA, performing, by the NEF, port configuration of the 5GS in an external port configuration scheme.