SDN-Controlled Ring Relay Network for Rapid Failure Recovery
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Solution Overview
Problem
Conventional communication systems with multiple relay devices and an SDN controller do not efficiently manage network configuration changes during failures, leading to prolonged establishment of communication paths.
Innovation Solution
A communication system with relay devices connected in a ring shape, utilizing an SDN controller to manage network configuration changes by directly connecting at least one relay device to the controller, enabling quick frame transmission to adjacent devices and dynamic reconfiguration upon link failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If relay devices transmit frames sequentially through conventional communication paths, then network configuration changes can be managed, but the time required to establish communication paths becomes prolonged
Solution Approach 1:
The SDN controller pre-configures multiple communication paths in advance before failures occur. When a failure is detected, the pre-established alternative paths are immediately activated without waiting for path discovery or negotiation, significantly reducing the time required to establish new communication paths.
Solution Approach 2:
The system dynamically switches between multiple communication paths based on real-time failure detection. The relay devices can flexibly transition from primary to backup paths, and the SDN controller dynamically updates routing decisions to optimize frame transmission efficiency under changing network conditions.
2Reliability
If relay devices are connected in a ring shape with multiple communication paths, then failure recovery is improved, but the complexity of managing network configuration changes increases
Solution Approach 1:
The SDN controller serves as a centralized intermediary that manages all relay devices and communication paths. It consolidates configuration management functions, allowing the ring-shaped topology to provide failure recovery capabilities while the controller simplifies the complexity of coordinating multiple paths and devices through centralized control.
Solution Approach 2:
The SDN controller performs multiple functions including failure detection, path selection, configuration management, and frame transmission coordination. This multi-functionality reduces the overall system complexity by consolidating management tasks into a single controller rather than requiring distributed complexity across multiple devices.
3Speed
If the SDN controller directly connects to at least one relay device, then frame transmission speed is improved, but the dependency on controller reliability increases
Solution Approach 1:
The system establishes direct connections between the SDN controller and relay devices in advance, preparing high-speed transmission paths before failures occur. When failures are detected, these pre-established direct paths enable rapid frame transmission to alternative destinations, balancing speed improvement with reliability through proactive configuration.
Solution Approach 2:
The ring-shaped topology provides local redundancy where each relay device has alternative paths available if the primary path fails. This local quality ensures that while direct controller connections provide speed, the distributed ring structure maintains reliability by providing multiple local routes that can be activated independently.
Data Source
AI summary
A communication system includes multiple relay devices and an SDN controller. The multiple relay devices are connected in a ring shape on multiple communication paths via which multiple communication devices communicate with one another. The SDN controller is configured to manage the multiple relay devices. The multiple relay devices each is configured to receive a frame transmitted from the SDN controller and transmit the received frame to multiple adjacently connected relay devices among the multiple relay devices.