TSN Synchronization Delay Conversion Across 3GPP and TSN Clocks
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Solution Overview
Problem
In mobile communication networks, the reference times of a 3GPP network and a TSN network differ, leading to inaccurate and insufficient information transmission during PDU session setup for time sensitive networking, hindering synchronization.
Innovation Solution
A method and device for reporting delay times in a mobile communication system to a TSN server, involving the reception of residence time and packet delay budget, calculation of bridge delay, and conversion to TSN clock-based information for accurate transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 3GPP network reference time is used for TSN synchronization information transmission, then the information can be transmitted in the mobile communication network, but the information becomes inaccurate for TSN network synchronization
Solution Approach 1:
The patent introduces a time conversion function as an intermediary component that converts 3GPP network reference time to TSN network reference time. This mediator translates between two different time reference systems, allowing the mobile communication network to transmit synchronization information using its native 3GPP time reference while ensuring accuracy for TSN network synchronization requirements
Solution Approach 2:
The patent changes the time reference parameter from 3GPP network reference time to TSN network reference time through a conversion function. By transforming the time parameter representation and calculation basis, the system maintains compatibility with 3GPP network infrastructure while delivering accurate TSN-synchronized timing information
2Measurement precision
If delay time information is transmitted without conversion, then the transmission process is simple, but the synchronization precision deteriorates
Solution Approach 1:
The patent performs time reference conversion in advance before transmitting delay time information to the TSN network. By pre-converting the time reference from 3GPP format to TSN format, the system ensures synchronization precision is maintained upon reception without requiring complex real-time conversion processing at the receiving end
Data Source
AI summary
The present disclosure relates to a 5G or pre-5G communication system to be provided in order to support higher data transmission rates than 4G communication systems such as LTE. According to an embodiment of the present disclosure, disclosed is a method for a time-sensitive networking (TSN) application function device of a mobile communication system to report a delay time of the mobile communication system to a TSN server, wherein a residence time based on a grand master (GM) clock of the mobile communication system is received from a UE communicating with a first TNS node, and a packet delay budget (PDB) based on a clock of the mobile communication system is received from a user plane function (UPF) device that communicates with a second TSN node. The PDB is the time it takes to transmit packets or messages between the UE and a UPF, and bridge delay information based on a TSN clock is delivered to the TSN server on the basis of such information.