Optical Network System Failure Switching
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Solution Overview
Problem
Existing optical network systems with single optical links are unsustainable during failures, as they require additional equipment for network duplication and often fail to detect upper link or logical failures, leading to service disruptions.
Innovation Solution
An optical network system with independent upper and lower link optical interfaces, monitoring units, and packet control units that switch signals to standby lines upon failure detection, eliminating the need for separate duplication equipment and enabling continuous service by monitoring physical and logical failures across multiple transfer network equipment connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network duplication-dedicated additional equipment is used to duplicate the transfer network, then service continuity during failure is improved, but device complexity and cost increase due to additional equipment requirements
Solution Approach 1:
The patent merges the functions of network duplication and failure detection into the existing transfer network equipment. The monitoring unit is integrated within the transfer network equipment itself, eliminating the need for separate duplication equipment. The same optical interface devices and transfer network equipment serve dual purposes: normal data transmission and failure detection/monitoring.
Solution Approach 2:
The transfer network equipment is designed with multi-functionality, serving both as a data transmission device and a monitoring device. The optical interface devices and transfer network equipment perform multiple functions including data forwarding, failure detection, and service switching, eliminating the need for dedicated additional equipment for network duplication.
2Reliability
If network duplication-dedicated additional equipment is deployed to monitor optical line failures, then failure detection capability is improved, but device complexity increases due to additional monitoring equipment
Solution Approach 1:
The monitoring function is merged into the existing transfer network equipment structure. The monitoring unit utilizes the same optical receivers and signal paths already present in the transfer network equipment, combining data transmission and failure monitoring functions in a single integrated system without requiring separate monitoring equipment.
Solution Approach 2:
The transfer network equipment performs self-monitoring of its own optical links and upper links. The monitoring unit detects failures in the optical lines and upper links using the equipment's own resources, eliminating the need for external dedicated monitoring equipment.
3Device complexity
If a single optical link is used to connect upper and lower network equipment, then device complexity is reduced, but service sustainability during failure deteriorates
Solution Approach 1:
The system prepares standby service paths in advance by establishing multiple optical link connections through different transfer network equipment. When a failure is detected on the working line, the system can immediately switch to the pre-prepared standby path without requiring additional configuration or equipment, ensuring continuous service.
Solution Approach 2:
The network system dynamically switches between working lines and standby lines based on real-time failure detection. The line control unit monitors the status of optical links and automatically transitions from a static single-link configuration to a dynamic multi-link configuration when failures occur, maintaining service sustainability.
Data Source
AI summary
Disclosed is an optical network system including a upper network equipment, a lower network equipment, and a plurality of transfer network equipments connecting the upper network equipment and the lower network equipment through independent optical links, wherein the lower network equipment performs switching such that transmission and reception of an optical signal are performed through an optical link of a standby line when a failure occurs in at least one of an optical link used as a working line, an optical interface device associated with the working line in the upper network equipment, and a transfer network equipment associated with the working line.