CDMA Bidirectional Communication with Unidirectional Buses for Avionics
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Solution Overview
Problem
Existing intercommunication systems for avionics platforms face integration difficulties and high production costs due to their federated architecture, which is difficult to scale and redesign for smaller platforms.
Innovation Solution
A bidirectional data communication system using two unidirectional data buses synchronized by a synchronization bus, with CDMA encoding, allowing for a distributed architecture without a central unit, enabling scalability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a federated architecture with central control unit is used, then system functionality and control are improved, but device complexity and production cost increase
Solution Approach 1:
The invention extracts the central control unit from the system architecture, removing the master unit that coordinated all secondary units. Each secondary unit now operates autonomously with its own transmitter and receiver, eliminating the need for centralized control while maintaining full system functionality through peer-to-peer communication.
Solution Approach 2:
Each secondary unit is equipped with both transmission and reception capabilities, allowing units to serve themselves rather than relying on a central controller. The system uses self-organizing communication where units autonomously establish connections and manage data exchange without external coordination.
2Reliability
If a federated architecture with central control unit is used, then system control is improved, but ease of manufacture and scalability worsen
Solution Approach 1:
The system is segmented into independent secondary units, each with identical functional capabilities. This modular segmentation allows units to be manufactured separately and assembled into different system configurations, improving ease of manufacture and reducing production costs while maintaining effective control through distributed architecture.
Solution Approach 2:
Each secondary unit is designed as a universal module capable of both transmitting and receiving data, and can function in multiple roles within the system. This multi-functionality reduces the variety of components needed, simplifying manufacturing processes and reducing overall production costs.
3Stability of the object's composition
If a federated architecture with central control unit is used, then system stability is improved, but adaptability to different platforms worsens
Solution Approach 1:
The system employs dynamic configuration where secondary units can be added, removed, or repositioned without affecting overall system stability. The distributed architecture naturally adapts to changing system composition, maintaining stability through autonomous unit interactions rather than rigid centralized control.
Solution Approach 2:
The system allows parameter changes in system configuration, such as the number of units, their positions, and communication patterns, without requiring fundamental redesign. This flexibility enables adaptation to different platforms and applications while maintaining stable operation through the robust distributed communication protocol.
Data Source
AI summary
Communication system, comprising: a first data bus configured to transport a first data signal according to a first transmission direction; a second data bus configured to transport a second data signal according to a second transmission direction different from the first transmission direction; a synchronization bus; and a plurality of local resources generating a respective local signal to be transmitted on the first and second data bus. All transceivers are modulated with CDMA encoding and take place following a synchronism signal. The unidirectionality of transmission on the data buses guarantees the absence of interference. The communication system is fully scalable.