Two-Wire Communication System for Low-Latency Automotive Wiring
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Solution Overview
Problem
The proliferation of electronic components in devices like automobiles and robotic systems leads to excessive wiring, increasing system complexity, weight, and decreasing performance and reliability due to the conventional communication infrastructure used for signal exchange.
Innovation Solution
A low-latency, time division multiplexed (TDM) two-wire communication system that provides bi-directional synchronous data, clock, and synchronization signals over a twisted wire pair, enabling direct point-to-point connections between nodes and supporting power transmission, allowing multiple nodes to contribute or consume channel content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional communication infrastructure is used to exchange signals between components, then communication between components is achieved, but wiring becomes thick and heavy, increasing system complexity and weight
Solution Approach 1:
The patent combines multiple communication functions (data transmission, clock signaling, synchronization) into a single two-wire bus system. The master node integrates clock generation and data transmission capabilities, while slave nodes combine reception and processing functions, eliminating the need for separate thick cable bundles for each signal type.
Solution Approach 2:
The two-wire bus serves multiple functions simultaneously: it transmits data bidirectionally, carries clock signals for synchronization, provides power distribution to slave nodes, and enables discovery and configuration protocols. This multi-functionality replaces what would traditionally require multiple dedicated cable bundles.
2Adaptability or versatility
If more electronic components are included in devices, then device functionality increases, but wiring complexity and weight increase excessively
Solution Approach 1:
The system segments the network into master nodes and slave nodes, where the master node handles complex functions (clock generation, protocol management, data routing) and slave nodes handle simpler functions (signal reception, local processing). This segmentation allows multiple components to be added without proportionally increasing overall system complexity.
Solution Approach 2:
The patent transitions from traditional point-to-point wiring (one-dimensional connections) to a bus-based architecture where multiple nodes share common communication lines (adding temporal and logical dimensions). Time-division multiplexing allows multiple signals to share the same physical medium by transmitting in different time slots.
3Reliability
If thick cable bundles are used for signal exchange, then communication infrastructure is established, but system weight increases and performance decreases
Solution Approach 1:
The patent replaces the mechanical/electrical system of thick cable bundles with a lighter two-wire differential signaling system. The use of differential signaling (balanced voltage swings) provides noise immunity and signal integrity without requiring heavy shielding or thick cables, thus maintaining reliability while reducing weight and improving performance.
4Ease of operation
If conventional wiring infrastructure is used, then signal exchange is achieved, but system weight and complexity increase
Solution Approach 1:
Multiple signal exchange functions are merged into the two-wire bus: bidirectional data communication, clock distribution, power delivery, and protocol management all occur over the same physical medium, eliminating the need for separate cable bundles for each function.
Solution Approach 2:
The system uses periodic clock signals and time-division multiplexing to manage communication between master and slave nodes. Data transmission occurs in structured frames with designated time slots for different operations (discovery, configuration, normal data exchange), providing ease of operation through predictable, periodic communication patterns.
Data Source
AI summary
Disclosed herein are two-wire communication systems and applications thereof. In some embodiments, a slave node transceiver for low latency communication may include upstream transceiver circuitry to receive a first signal transmitted over a two-wire bus from an upstream device and to provide a second signal over the two-wire bus to the upstream device; downstream transceiver circuitry to provide a third signal downstream over the two-wire bus toward a downstream device and to receive a fourth signal over the two-wire bus from the downstream device; and clock circuitry to generate a clock signal at the slave node transceiver based on a preamble of a synchronization control frame in the first signal, wherein timing of the receipt and provision of signals over the two-wire bus by the node transceiver is based on the clock signal.