Mobility Management for Industrial Ethernet MAC Address Updates
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Solution Overview
Problem
Current methods for managing mobility in industrial Ethernet networks are inefficient, as they require updating the MAC address forwarding table for terminal devices, leading to resource waste and potential service disruptions during device movement.
Innovation Solution
A mobility management method where a control plane network element determines and notifies terminal devices of a changed MAC address, allowing for flexible switching of forwarding paths without updating the MAC address forwarding table, ensuring service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the MAC address forwarding table is updated when a terminal device moves, then the forwarding path can be switched, but resource waste occurs and service continuity cannot be ensured
Solution Approach 1:
The patent segments the MAC address management into device-level updates rather than network-wide table updates. Each terminal device independently updates its own MAC address in the control plane, eliminating the need for comprehensive forwarding table modifications across the entire network, thus maintaining service continuity while enabling path switching.
Solution Approach 2:
The control plane network element acts as an intermediary that coordinates MAC address changes. It determines the new MAC address for a moving terminal device and notifies relevant network elements, thereby mediating the transition without requiring direct updates to the MAC address forwarding table, ensuring reliable service continuity.
2Adaptability or versatility
If the MAC address forwarding table is updated when a terminal device moves, then the forwarding path can be switched, but resource waste occurs
Solution Approach 1:
The patent extracts the MAC address update operation from the comprehensive forwarding table update process. Instead of modifying the entire MAC address forwarding table, only the specific MAC address of the moving terminal device is updated in the control plane, significantly reducing the scope of operations and resource consumption while maintaining path switching capability.
Solution Approach 2:
The patent applies partial action by updating only the necessary MAC address information rather than performing a complete forwarding table update. This selective update approach reduces resource waste while still achieving the required forwarding path switching functionality.
3Adaptability or versatility
If the MAC address forwarding table is modified during terminal device movement, then path switching is attempted, but modification failure or incompleteness occurs
Solution Approach 1:
The control plane network element provides feedback by determining the new MAC address and notifying relevant network elements of the change. This feedback mechanism ensures that the MAC address update is properly coordinated and confirmed, preventing modification failures or incompleteness and ensuring reliable path switching.
Solution Approach 2:
The control plane network element performs preliminary determination of the new MAC address before the actual path switching occurs. This preliminary action ensures that the MAC address is properly prepared and assigned, preventing modification failures and ensuring complete and reliable path switching when the terminal device moves.
Data Source
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AI summary
A mobility management method and apparatus are provided, to flexibly switch a forwarding path, and ensure service continuity in a movement process of a terminal device. The method includes: A control plane network element determines a changed media access control address MAC address of a first terminal device after the first terminal device moves. Then, the control plane network element determines at least one second terminal device that belongs to a same terminal device group as the first terminal device, where the first terminal device is a terminal device whose address changes after the movement, and the at least one second terminal device is a terminal device other than the first terminal device in the terminal device group. Finally, the control plane network element notifies the first terminal device and the at least one second terminal device to update to the changed MAC address of the first terminal device.