Secure Communication Gateway with Redundant Link Switching
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Solution Overview
Problem
Existing secure communication devices are unreliable due to network failures, require identical equipment, and offer limited services, especially during exceptional events or crisis situations, and are susceptible to interference and jamming.
Innovation Solution
Implementing network redundancy through physical redundancy by connecting a mobile terminal to a communication unit with two modems, each establishing secure links to an access server, allowing seamless switching between links in case of failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network redundancy is implemented through multiple modems and links, then reliability is improved, but device complexity increases
Solution Approach 1:
The communication system is segmented into multiple independent communication links (first link through first modem, second link through second modem) that can operate autonomously. Each link is a separate functional unit that can be individually managed, monitored, and switched without affecting the other links, thereby improving reliability while keeping each segment manageable in complexity.
Solution Approach 2:
Multiple communication links are established and configured in advance before any failure occurs. The system pre-configures backup links and maintains them in a ready state, so that when a failure is detected, the switch to an alternative link can occur immediately without delay for setup or configuration, thus improving reliability without requiring complex real-time decision-making.
2Reliability
If secure communication is implemented with specialized devices, then security is improved, but adaptability deteriorates
Solution Approach 1:
The communication device is designed with multiple modems and communication interfaces that can handle various types of communications (voice, data, messaging) through a unified secure architecture. The same secure communication framework and encryption mechanisms are applied across all communication services and links, allowing the device to provide diverse services while maintaining consistent security standards, thereby achieving both security and adaptability.
Data Source
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AI summary
A secure, high-availability communication system between a mobile terminal and an application server, characterized in that: - the terminal is connected to a communication box, said communication box having at least three physical communication interfaces, one local physical communication interface used to communicate with the terminal; - the communication box is connected to an access server by a first link established through a first remote physical communication interface and by a second link established through a second remote physical communication interface; - the application server is connected to the access server, the terminal and the application server communicating through the communication box and the access server using one of the two previously established links; - the communication box is the network gateway for the terminal;- The communication box: - maintains a local routing table based on the routing performance of at least one physical interface for remote communications; - maintains a remote routing table on the access server so that at the same time the communication box and the access server use the same link.