5G-TSN Time Translation for Cross-Clock Delay Information
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Solution Overview
Problem
In Time-Sensitive Networks (TSN), there are challenges in determining and transmitting time-related information across different control nodes with varying clock requirements, leading to potential errors in task execution due to time differences and frequency discrepancies between 5G and TSN clocks.
Innovation Solution
The method involves adjusting time information based on clock differences between 5G and TSN clocks, and sending appropriate time-related information to ensure accurate time-sensitive data transmission, including bridge delay adjustments and QoS mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time information is transmitted using different clock references (5G clock vs TSN clock) across network nodes, then each node can maintain its own time synchronization, but time-related information becomes inconsistent leading to execution errors
Solution Approach 1:
The patent introduces a bridge device as an intermediary between 5G network and TSN network. This bridge translates time information between the two different clock systems, acting as a mediator that converts 5G clock time references to TSN clock time references (or vice versa), thereby maintaining time information consistency across the hybrid network while allowing each subsystem to maintain its own synchronization
Solution Approach 2:
The patent changes the time reference parameter from one clock system to another. Specifically, it transforms time information expressed in 5G clock time references into equivalent time information in TSN clock time references by applying offset calculations and frequency ratio adjustments, thus resolving the inconsistency caused by different clock parameters
2Adaptability or versatility
If a hybrid network bridge connects 5G network and TSN network with different clock systems, then network versatility is improved, but device complexity increases due to multiple clock management requirements
Solution Approach 1:
The bridge device is designed with multi-functionality to handle both 5G network protocols and TSN network protocols simultaneously. It can translate not only time information but also other control plane messages, making a single device capable of managing heterogeneous network connections without requiring separate dedicated devices for each network type
Solution Approach 2:
The bridge serves as a universal intermediary that abstracts the complexity of managing multiple clock systems. By centralizing the clock translation function in the bridge, the complexity is localized to a single component rather than being distributed across all network nodes, simplifying overall system management
3Device complexity
If clock frequency differences between 5G and TSN clocks are not compensated, then system simplicity is maintained, but time precision deteriorates leading to failed time-sensitive tasks
Solution Approach 1:
The patent applies parameter transformation to compensate for frequency differences. It calculates the frequency ratio between 5G clock and TSN clock, and uses this ratio to adjust time information during translation. This parameter change approach maintains relatively simple system architecture while achieving high time precision through mathematical compensation rather than hardware synchronization
Data Source
AI summary
An information control method and a communications device are provided. First time information is adjusted to second time information according to information about a clock difference between a first clock and a second clock. The first time information is time-related information based on the first clock, and the second time information is time-related information based on the second clock. First information is sent. The first information includes the first time information. The first time information includes at least one of the following: a first User Equipment (UE)-Device-Side Time-Sensitive Network Translator (Device-Side TSN Translator (DS-TT)) residence time, or a first Packet Delay Budget (PDB).