Cell Handover Selection Using TSN/TSC Clock Requirements
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Solution Overview
Problem
In 5G Industrial Internet Of Things (IIoT) systems, terminal devices handed over to cells that do not meet Time Sensitive Networking (TSN) or Time Sensitive Conveying (TSC) clock requirements experience increased latency or decreased quality of service (QoS) for TSN or TSC services.
Innovation Solution
A management method for cell handover that involves determining a target cell meeting TSN or TSC clock requirements by using reference clock information, ensuring seamless handover of terminal devices to cells with suitable synchronization accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal devices are randomly handed over to any target cell, then handover speed and ease of operation are improved, but time synchronization accuracy and service quality deteriorate
Solution Approach 1:
The source base station obtains reference clock information from candidate target cells before initiating handover. This preliminary action allows the system to evaluate time synchronization accuracy in advance and select an appropriate target cell that meets TSN/TSC requirements, avoiding random handover to unsuitable cells.
Solution Approach 2:
Reference clock information serves as an intermediary parameter to evaluate target cell suitability. The source base station uses this information as a criterion to select target cells, ensuring that handover decisions are based on time synchronization accuracy rather than random selection.
2Device complexity
If terminal devices are handed over to cells without clock requirement verification, then device complexity and handover procedure complexity are reduced, but service reliability and time synchronization quality deteriorate
Solution Approach 1:
The source base station obtains and evaluates reference clock information from candidate target cells before initiating handover. This preliminary verification ensures that only cells meeting TSN/TSC clock requirements are selected, maintaining service reliability without requiring complex terminal device operations.
Solution Approach 2:
The network side (source base station) autonomously performs clock requirement verification when selecting target cells. This self-service approach maintains high service reliability while keeping terminal device complexity low, as the verification is handled by the network infrastructure rather than the terminal.
3Adaptability or versatility
If cells with poor clock synchronization are selected as target cells, then handover flexibility and adaptability are improved, but service quality and latency requirements are not met
Solution Approach 1:
The system changes the selection criterion from random or signal-strength-based selection to reference clock information-based selection. By using clock synchronization accuracy as the key parameter, the system ensures that handover decisions meet TSN/TSC latency requirements while maintaining flexibility through multiple candidate cell evaluation.
Data Source
AI summary
Embodiments of the present application provide a management method, device and storage medium for cell handover. When the terminal device needs to be handed over from a source cell to another cell, a network device in the source cell determines, according to reference clock information received from a designated node, a target cell that meets a preset condition, and further, hands over the terminal device from the source cell to the target cell, where the preset condition may be a preset condition meeting TSN or TSC clock requirements; in other words, when the target cell meets the TSN or TSC clock requirements, the terminal device can be handed over from the source cell to the target cell.