Sensor Bridge Direct Mapping for Low-Latency Ethernet Packets
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Solution Overview
Problem
Existing systems incur significant latency in transmitting sensor data over packet networks due to the interface between sensors and networks, which affects applications requiring rapid data analysis, such as automotive systems, and are inefficient in terms of hardware size, cost, and power consumption.
Innovation Solution
A sensor bridge system that uses direct mapping techniques to map sensor data directly onto Ethernet packets, reducing latency to below 1 microsecond by employing a sensor interface, mapper, and communication processor, which includes a memory buffer and predefined mapping to specified bit positions in Ethernet frames, and adds routing and OAM information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional sensor interface protocols (e.g., MIPI CSI-2) are used to transmit sensor data over packet networks, then data transmission can be achieved, but significant latency is incurred due to protocol conversion and processing overhead
Solution Approach 1:
The patent extracts and eliminates the intermediate protocol conversion layer between sensors and Ethernet networks. By directly mapping sensor data to Ethernet packets without going through traditional interfaces like MIPI CSI-2, the system removes the processing overhead and latency associated with protocol translation, while maintaining necessary network functionality through embedded routing and OAM information
Solution Approach 2:
The patent introduces a specialized mapping layer that acts as an intermediary between sensor data and Ethernet packets. This mapping layer directly translates sensor data formats to Ethernet packet structures, embedding routing information and OAM data without requiring full protocol conversion, thereby reducing latency while maintaining interface functionality
2Productivity
If traditional sensor interfaces with protocol conversion are used, then comprehensive data transmission functionality can be achieved, but hardware size, cost, and power consumption increase
Solution Approach 1:
The patent removes unnecessary protocol conversion hardware and processing stages from the data transmission path. By directly mapping sensor data to Ethernet packets, the system eliminates redundant processing components that consume power, while maintaining full transmission functionality through optimized direct mapping with embedded routing and OAM information
Solution Approach 2:
The patent applies local quality optimization by selectively embedding only the necessary routing information and OAM data at specific positions within the Ethernet packets, rather than implementing full protocol conversion. This localized approach reduces processing requirements and power consumption while maintaining essential network functionality
Data Source
AI summary
A sensor bridge, for use in an Ethernet network in a vehicle, includes a sensor interface, a mapper and a communication processor. The sensor interface is configured to receive sensor data from a sensor installed in the vehicle. The mapper is configured to form mapped sensor data by applying to the sensor data a direct mapping that maps specified parts of the sensor data to corresponding bit positions in one or more Ethernet packets. The communication processor is configured to generate the one or more Ethernet packets including the mapped sensor data, and to transmit the one or more Ethernet packets over the Ethernet network.