Time epoch synchronization methods and systems for wireless communications

WO2026137321A1PCT designated stage Publication Date: 2026-07-02ZTE CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ZTE CORP
Filing Date
2024-12-26
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

In existing 5G systems, the ingress and egress ports of a 5GS logic bridge do not know which epoch the other port is using, leading to significant errors in residence time calculation and incorrect time synchronization due to the use of different epochs across multiple PTP time domains.

Method used

The 5G Timing Control Network Function (TCNF) transmits epoch information to the DS-TT/UE and NW-TT/UPF, ensuring accurate determination of timestamps by specifying the epoch used for time synchronization, thereby correcting the residence time calculation and enhancing synchronization accuracy.

Benefits of technology

This approach ensures precise time synchronization by aligning the epochs across the 5GS logic bridge ports, reducing errors and improving network communication efficiency.

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Abstract

Methods and systems for time epoch synchronization in current and emerging wireless networks are described. An example method includes receiving, by a timing module of a wireless device or a timing module of a network node from a network function, a message indicative of epoch information for a network time reference, and performing, based on the epoch information, at least one synchronization operation. Another example method includes transmitting, by a network function to a timing module of a wireless device or a timing module of a network node, a message indicative of epoch information for a network time reference. An example system includes one or more processors, implemented at the wireless device, the network node, or the network function, that are configured to implement the above-described methods.
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