Submarine Cable Wavelength Switching for Failure-Time Data Secrecy
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Solution Overview
Problem
In submarine cable systems with open platforms where devices from different manufacturers are used, the PRBS function for data secrecy cannot be implemented during disaster tolerance, leading to increased risks of data leakage.
Innovation Solution
A data secrecy method involving a wavelength management device that determines a disaster tolerance set and replaces target optical signals with virtual optical signals of the same wavelength but without data content, and performs optical path switching to maintain transmission stability and reduce data leakage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If open submarine cable system platforms with devices from different manufacturers are used, then system adaptability and versatility are improved, but data secrecy reliability deteriorates because PRBS function cannot be implemented
Solution Approach 1:
The patent introduces a wavelength management device as an intermediary component that implements optical path switching functionality. This device acts as a mediator between the terminal stations and branching units, enabling the system to achieve disaster tolerance and data secrecy without requiring PRBS functions from the branching units. The wavelength management device replaces the need for manufacturer-specific PRBS implementations with a universal optical path switching mechanism.
Solution Approach 2:
The patent changes the operational parameter from electrical/digital PRBS scrambling to optical path switching. By switching the operational mode from requiring identical manufacturer devices (for PRBS) to using wavelength-based optical path control, the system achieves compatibility across different manufacturers while maintaining data secrecy through virtual optical signal replacement.
2Reliability
If PRBS function is used for data secrecy during disaster tolerance, then data secrecy reliability is improved, but device compatibility deteriorates because devices must be from the same manufacturer
Solution Approach 1:
The wavelength management device serves as an intermediary that centralizes the optical path switching functionality. Instead of requiring each branching unit to have PRBS capability (which limits compatibility), the wavelength management device handles the secrecy function centrally, allowing branching units from different manufacturers to be used without compromising data secrecy.
Solution Approach 2:
The wavelength management device provides universal optical path switching functionality that works with devices from any manufacturer. This multi-functional device replaces the need for manufacturer-specific PRBS implementations, making the disaster tolerance mechanism universally applicable across heterogeneous equipment.
3Stability of the object's composition
If optical path switching is performed to transfer services during failure, then transmission stability is improved, but data leakage risk increases without virtual signal replacement
Solution Approach 1:
The patent applies preliminary action by pre-configuring virtual optical signals and establishing disaster tolerance sets before failures occur. When a failure is detected, the system can immediately switch to pre-prepared virtual signals, ensuring both transmission stability and data secrecy without the need for real-time signal generation or complex processing during the failure event.
Solution Approach 2:
The patent creates virtual copies of optical signals that do not contain actual data content. These virtual signals are copies in form but devoid of substantive information, allowing the system to maintain signal transmission for stability while preventing data leakage. The virtual optical signals replicate the physical presence of data-bearing signals without carrying the actual information.
Data Source
AI summary
The present application discloses a data secrecy method for a submarine cable system with a failure and a submarine cable system. The method includes: determining a first disaster tolerance set in response to that a failure occurs to a first branch; and replacing a target optical signal in a first optical signal with a virtual optical signal. The first branch is any branch in the submarine cable system. The first disaster tolerance set includes at least one wavelength used for optical signals for transfer from a first terminal station to the first branch. The first optical signal is an optical signal output from the first terminal station. The target optical signal includes optical signals corresponding to the respective wavelengths in the first disaster tolerance set. The virtual optical signal is an optical signal that does not carry data content.