5G Terminal Time Synchronization Using Subscription-Based Service Control
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Solution Overview
Problem
There is a need for a method in 5G systems to provide time synchronization services to terminals using UE subscription information.
Innovation Solution
A method involving the acquisition and utilization of subscription data from a unified data management (UDM) device to identify support for 5G access stratum (AS)-based and precision time protocol (PTP)-based time synchronization services, along with error budget, allowed area, and time information, to control the provision of time synchronization services to terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the 5G system provides time synchronization services to terminals, then time synchronization accuracy is improved, but system complexity increases due to the need to manage subscription data and multiple synchronization methods
Solution Approach 1:
The patent introduces subscription data as an intermediary element that mediates between the terminal and the time synchronization service. The subscription data contains all necessary information about supported synchronization methods (5G AS-based and PTP-based), error budgets, and allowed areas, eliminating the need for complex direct management of multiple synchronization protocols by the network side.
Solution Approach 2:
The patent changes the approach from managing synchronization services through complex network-side control to using pre-configured subscription parameters stored in the terminal. The subscription data includes parameters such as supported synchronization methods, error budgets, and geographic constraints, which the terminal uses to determine appropriate synchronization services without requiring complex real-time network management.
2Adaptability or versatility
If the system supports multiple time synchronization methods (5G AS-based and PTP-based), then service versatility is improved, but the difficulty of detecting and measuring supported capabilities increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing subscription data in the terminal before service establishment. The subscription data includes pre-filled information about supported synchronization methods (5G AS-based and PTP-based), error budgets, and allowed areas. This eliminates the need for complex real-time capability detection during service establishment, as the terminal already knows what synchronization methods it supports.
3Measurement precision
If the network acquires and processes subscription data from UDM, then service control precision is improved, but information processing complexity increases
Solution Approach 1:
The patent extracts the time synchronization service control logic from the network side and places it in the terminal through subscription data. The subscription data contains extracted and pre-processed information about supported synchronization methods, error budgets, and allowed areas. This extraction reduces the information processing complexity at the network side while maintaining precise service control, as the terminal autonomously uses its subscription data to determine appropriate synchronization services.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to the present disclosure, if the 5G communication system becomes a synchronization source (sync source) so that a synchronization service is provided to a terminal, whether to provide the service is determined on the basis of subscription information about the terminal and the service provision can be controlled.