A2B Protocol Engine for Multi-Node Bus Wiring Reduction
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Solution Overview
Problem
The proliferation of sensors in automobiles and similar systems leads to excessive wiring, increasing system complexity, weight, and potentially decreasing performance and reliability, which existing two-wire conductor systems fail to adequately address.
Innovation Solution
A two-wire communication protocol engine, specifically the A2B protocol engine, manages control and data transmissions in a bi-directional, multi-node bus system using a twisted wire pair bus, enabling synchronized updates, distributed interrupts, and data scrambling, while supporting power transmission and reducing electromagnetic emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors and peripheral devices are added to automobiles, then functionality and feature richness are improved, but system complexity and wiring quantity increase excessively
Solution Approach 1:
The patent merges data communication and power transmission into a single two-wire bus system. Multiple sensors and peripheral devices are connected through a shared communication bus that carries both digital data and power signals, eliminating the need for separate wiring for each function and thereby reducing overall system complexity despite sensor proliferation
Solution Approach 2:
The two-wire bus system performs multiple functions simultaneously: it serves as a communication channel for data exchange, a power delivery system for energizing sensors and devices, and a synchronization mechanism for coordinated operation. This multi-functionality allows the system to support numerous sensors without proportionally increasing wiring complexity
2Reliability
If traditional multi-wire communication systems are used for each sensor, then data transmission reliability is improved, but system weight and complexity increase
Solution Approach 1:
The patent combines multiple communication wires into a single differential pair that handles both data and power. This consolidation maintains reliable data transmission through differential signaling (which is immune to common-mode noise) while dramatically reducing the total wire mass in the system
3Adaptability or versatility
If data is transmitted over long twisted wire pairs in noisy environments, then system adaptability is improved, but electromagnetic emissions and interference increase
Solution Approach 1:
The patent uses differential signaling to convert the potential harm of electromagnetic interference into a benefit. By transmitting data as the difference between two wires (differential mode) rather than relative to ground (single-ended mode), the system naturally rejects common-mode noise and electromagnetic emissions, turning the noisy environment into an acceptable operating condition
Data Source
AI summary
In an example embodiment, a two-wire communication protocol engine manages control and data transmissions in a bi-directional, multi-node bus system where each node is connected over a twisted wire pair bus to another node. Some embodiments include a state machine that allows for synchronized updates of configuration data across the system, a distributed interrupt system, a synchronization pattern based on data coding used in the system, and data scrambling applied to a portion of the data transmitted over the twisted wire pair bus. The multi-node bus system comprises a master node and a plurality of slave nodes. The slave nodes can be powered over the twisted wire pair bus.