Full-Duplex Single-Ended Serial Link for Space-Constrained Data Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current data transfer systems in applications like automotive and aircraft require reducing physical space and weight by simultaneously transmitting high-speed and low-speed data over a single communication link, which is challenging due to stringent space and weight requirements.
Innovation Solution
A system for full-duplex communication using a single-ended communications link, where a first link interface generates a signal for transmission and a second link interface modulates it to encode both forward and reverse channel data simultaneously, allowing for simultaneous transmission of high-speed and low-speed data over a single coaxial cable or printed circuit board trace.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cables are used for high-speed data and low-speed control data, then data transmission reliability is maintained, but physical space and weight increase
Solution Approach 1:
The patent combines high-speed data transmission and low-speed control data transmission into a single differential serial link. The system uses a single cable with two conductors to carry both forward channel (high-speed video data) and reverse channel (low-speed control data) signals simultaneously, eliminating the need for separate cables and reducing overall weight.
Solution Approach 2:
The patent employs frequency division multiplexing to transmit different types of data over the same physical medium. By assigning high-speed data to one frequency range and low-speed control data to another frequency range, the system effectively adds a frequency dimension to the single cable, allowing simultaneous transmission without interference.
2Reliability
If separate cables are used for high-speed data and low-speed control data, then signal interference is avoided, but physical space requirements increase
Solution Approach 1:
The patent merges high-speed and low-speed data transmission into a single cable assembly, dramatically reducing the space required for cable routing. The compact single-cable design occupies significantly less space compared to multiple separate cables, making it ideal for space-constrained applications like automotive and aircraft systems.
Solution Approach 2:
The patent uses frequency filtering as an intermediary mechanism to separate and isolate the forward channel and reverse channel signals within the single cable. By employing filters at the receiver end, the system effectively manages signal interference and ensures clean separation of high-speed and low-speed data streams.
3Weight of moving object
If a single communication link is used for both high-speed and low-speed data, then cable weight and space are reduced, but signal isolation becomes challenging
Solution Approach 1:
The patent employs periodic frequency modulation and filtering techniques to manage signal isolation. By using periodic sampling and frequency-based separation, the system can distinguish between forward and reverse channel signals despite their simultaneous transmission, reducing the complexity of signal processing compared to alternative approaches.
4Productivity
If simultaneous bidirectional data transmission is implemented over a single link, then communication efficiency is improved, but signal interference increases
Solution Approach 1:
The patent transitions from spatial separation (multiple cables) to frequency separation (single cable with multiple frequency channels). By assigning different frequency ranges to forward and reverse channels, the system achieves simultaneous bidirectional transmission while minimizing interference through spectral isolation.
Solution Approach 2:
The patent introduces frequency filtering as an intermediary mechanism to manage signal interference. The filters act as mediators that allow the desired frequency range to pass while blocking unwanted frequencies, enabling clean separation of simultaneous bidirectional signals over the single communication link.
Data Source
AI summary
A system for full duplex communication using a single-ended communications link is described. The system includes a first link interface configured to generate a signal for transmission via the single-ended communications link. The signal includes data encoded in a forward channel. The system also includes a second link interface configured to receive the signal from the first link interface via the single-ended communications link and modulate the signal to encode data in a reverse channel so that the signal includes the forward channel data and the reverse channel data simultaneously.