Wireless Communication System for Reliable Vehicle Data Transmission
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Solution Overview
Problem
Wired networks in modern vehicles and industrial control systems are costly, cumbersome, and prone to interference, while wireless networks lack reliability due to environmental factors and interference, necessitating a solution for reliable communication in dynamic and unpredictable environments.
Innovation Solution
A wireless communication system utilizing multi-path routing, multiple channels, and redundant data transmission to achieve low bit error rates, incorporating techniques like route diversity, link diversity, and time diversity, along with voting schemes and adaptive coding to mitigate interference and ensure reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless networks are used to replace wired networks, then production and maintenance costs are reduced and weight is decreased, but reliability and resistance to interference deteriorate
Solution Approach 1:
The communication system segments the transmission path into multiple independent wireless paths between sensors/actuators and control units. Each path can operate independently, allowing the system to maintain communication even if individual paths fail due to interference or environmental factors, thus resolving the reliability issue while keeping the wireless architecture's manufacturing advantages
Solution Approach 2:
The system dynamically changes transmission parameters including switching between multiple channels and pseudo-randomly hopping frequencies. This parameter variation allows the system to adapt to changing interference conditions and environmental factors, maintaining reliable communication in a dynamic wireless environment without requiring wired connections
2Device complexity
If wireless networks are used to replace wired networks, then device complexity and weight are reduced, but resistance to interference and environmental factors deteriorates
Solution Approach 1:
The system divides the communication into multiple parallel wireless paths, each independent of the others. This segmentation allows the system to distribute the impact of interference across multiple paths rather than having a single point of failure, reducing the overall effect of harmful factors while maintaining relatively simple wireless device architecture
Solution Approach 2:
The system implements dynamic channel switching and pseudo-random frequency hopping to adapt to changing interference conditions. This dynamic behavior allows the communication system to respond to environmental factors in real-time, maintaining resilience against interference without requiring complex fixed infrastructure
3Reliability
If multiple channels and paths are used to improve reliability, then resistance to interference improves, but system complexity increases
Solution Approach 1:
The control units and sensors/actuators serve multiple functions by operating across multiple channels and paths simultaneously. Each device can communicate through any available path, making the system universally adaptable to different transmission conditions. This multi-functionality improves reliability without requiring dedicated complex hardware for each path
Solution Approach 2:
The system transmits data multiple times across different channels and paths, creating redundant copies of the same information. This copying approach ensures that if one transmission fails due to interference, alternative copies may succeed. The redundancy is implemented through software control rather than complex hardware duplication, managing system complexity while improving reliability
Data Source
AI summary
A wireless communication system comprises one or more control units operable to transmit control signals, a plurality of actuators responsive to the control signals, and a plurality of sensors operable to transmit sensor data used by the one or more control units in generating the control signals. Each of the sensors, actuators, and one or more control units are located at a fixed position in the system relative to one another. Each of the plurality of sensors and each of the plurality of actuators are coupled to at least one of the one or more control units via a plurality of wireless paths. Each of the plurality of sensors are operable to transmit the sensor data in an assigned time slot to at least one of the one or more control units over a plurality of wireless channels in each of the plurality of wireless paths. The number of channels in each of the plurality of wireless paths is determined based, at least in part, on a worst-case estimate of potential interference, and each of the plurality of sensors is operable to pseudo-randomly switch the plurality of channels over which the sensor data is transmitted.