Automotive Switch Fabric Network Architecture for Scalable Bandwidth
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Solution Overview
Problem
Current bus protocols in vehicles are not scalable and have limited bandwidth, struggling to meet the increasing demands of X-by-wire functionality, multimedia infotainment, and navigation systems, which require improved quality of service (QoS) in terms of bandwidth, speed, delay, jitter, fault tolerance, message integrity, availability, and survivability.
Innovation Solution
Implementing a switch fabric network architecture that provides scalability and redundancy, allowing multiple communication paths between devices, using packet data networks compliant with protocols like TCP/IP, ATM, or Infiniband, and incorporating smart nodes and dumb nodes to manage traffic and ensure guaranteed message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If current bus protocols are used, then device complexity is reduced and ease of manufacture is improved, but bandwidth and scalability are limited
Solution Approach 1:
The patent segments the communication network into multiple virtual channels within a switch fabric architecture, allowing different types of data (mission-critical vs. non-mission-critical) to be transmitted through separate paths. This segmentation enables increased bandwidth capacity while maintaining the simplicity of bus protocol implementation at the physical layer.
Solution Approach 2:
The patent introduces a new dimensional approach by implementing priority-based virtual channels that operate alongside traditional bus protocols. This adds a layer of differentiation without replacing the fundamental bus architecture, thereby increasing bandwidth capacity while preserving ease of manufacture through incremental integration.
2Device complexity
If current bus protocols are used, then device complexity is reduced, but quality of service for mission-critical data deteriorates
Solution Approach 1:
The patent applies local quality by differentiating service levels for different types of data transmission. Mission-critical data receives priority treatment through dedicated virtual channels with guaranteed bandwidth, while non-mission-critical data uses standard channels. This localized differentiation improves QoS for critical functions without fundamentally increasing overall device complexity.
Solution Approach 2:
The patent implements preliminary action through advance resource reservation for mission-critical data transmission. The system pre-allocates bandwidth and establishes priority queues before data transmission occurs, ensuring that time-sensitive communication requirements are met without requiring complex real-time adjustments during operation.
3Productivity
If bandwidth is increased to support new applications, then productivity is improved, but fault tolerance and message integrity deteriorate
Solution Approach 1:
The patent segments the communication network into multiple virtual channels within a switch fabric architecture, allowing different types of data (mission-critical vs. non-mission-critical) to be transmitted through separate paths. This segmentation enables increased bandwidth capacity while maintaining the simplicity of bus protocol implementation at the physical layer.
Solution Approach 2:
The patent implements feedback mechanisms through error detection and correction protocols that operate at the virtual channel level. This allows the system to maintain message integrity and fault tolerance even as bandwidth capacity is expanded through the addition of more virtual channels and higher data rates.
Data Source
AI summary
A vehicle communication network (200) includes a plurality of network elements (208-212) and a plurality of communication links (214-230) communicatively coupling the network elements in a point-to-point configuration. A portion of the communication capability is reserved according to a class of message traffic.