Non-1553 Overlay System for High-Bandwidth Data Transmission
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Solution Overview
Problem
The existing MIL-STD-1553 communication system is bandwidth inefficient, limiting data transfer capacity to 1 Mbps, and retrofitting aircraft with new equipment requires complex and costly rewiring, which is impractical for adding high-bandwidth data links.
Innovation Solution
A non-1553 data communication overlay system with a primary and redundant bus, utilizing OFDM signals to enhance data transfer capacity without rewiring, by selectively routing non-1553 signals between the primary and redundant buses based on performance metrics like BER and SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIL-STD-1553 signaling scheme is used, then high integrity message exchange is achieved, but data transfer capacity is limited to 1 Mbps
Solution Approach 1:
The patent combines MIL-STD-1553 signaling with OFDM signaling on the same physical bus infrastructure. The overlay system merges legacy 1553 message traffic and new high-speed data traffic into a single communication medium, allowing simultaneous operation of both protocols without requiring separate wiring harnesses.
Solution Approach 2:
The patent introduces a new dimension to the communication system by overlaying OFDM signals at different frequency ranges and modulation schemes atop the existing 1553 Manchester II encoding. This dimensional addition in the signal space enables higher data rates while preserving the original protocol's reliability characteristics.
2Adaptability or versatility
If new equipment is retrofitted to aircraft, then communication capabilities are enhanced, but wiring complexity and installation time increase
Solution Approach 1:
The overlay terminal is designed with multi-functionality, capable of operating in both 1553 mode and high-speed data mode through a single device interface. This universal terminal can communicate using traditional 1553 protocols while simultaneously supporting modern high-bandwidth applications, eliminating the need for separate wiring for different communication types.
Solution Approach 2:
The patent introduces an overlay terminal as an intermediary device that mediates between legacy 1553 systems and modern high-speed data requirements. This terminal acts as a bridge, translating and managing traffic between the two protocols over the same physical medium, thereby simplifying integration of new equipment.
3Productivity
If new wiring is installed for high bandwidth data links, then data transfer capacity increases, but aircraft weight and space increase
Solution Approach 1:
The patent changes the signaling parameters of the existing bus system by implementing OFDM modulation with multiple subcarriers and advanced encoding schemes. This parameter transformation enables the original wiring harness to carry significantly higher data rates (up to 100 Mbps or more) without any physical modifications to the aircraft's wiring infrastructure.
Data Source
AI summary
A 1553 data communication system having a primary data bus, a redundant data bus and a non-1553 data communication overlay system is provided. The non-1553 data communication overlay system comprises a non-1553 bus controller terminal and a non-1553 remote terminal. Each non-1553 terminal includes a non-1553 transmitter block connected to the primary bus and the redundant bus for sending non-1553 signals, a non-1553 receiver block for receiving non-1553 signals and a non-1553 receive path selection block. The non-1553 receive path selection block selectively establishes a receive path between the primary data bus or the redundant data bus and the non-1553 receiver block according to predefined receive path selection criteria. A 1553 data communication method is also provided.