Terminology » Other Wireless » LIN vs CAN vs FlexRay vs MOST: A Detailed Comparison

LIN vs CAN vs FlexRay vs MOST: A Detailed Comparison

automotive communication can flexray network

This article compares LIN, CAN, FlexRay, and MOST, highlighting the key differences between them.

Specifications Comparison

The following table summarizes the specifications for each communication protocol:

FeatureLINCANFlexRayMOST
Data Rate20 Kbps1 Mbps10 Mbps24 Mbps
Access ControlPollingCSMA/CATDMATDM CSMA/CA
Physical LayerSingle wireDual wireDual wire, optical fiberDual wire based fiber optic
ArchitectureSingle master, 2-10 slavesMulti-master, 10-30 nodesMulti-master, up to 64 nodesMulti-master, up to 64 nodes
Message TransmissionSynchronousAsynchronousSynchronous and AsynchronousSynchronous and Asynchronous
Message IdentificationIdentifierIdentifierIdentifierTime slot
UsageSubnetsSoft real timeHard real timeMultimedia
LatencyConstantLoad dependentConstantData stream

Key Differences Explained

The table above provides a concise comparison between LIN, CAN, FlexRay, and MOST. Here’s a more detailed breakdown:

  • LIN (Local Interconnect Network): Designed for low-speed communication within a vehicle, primarily for non-critical functions like window lifts or seat adjustments. It uses a single-wire architecture, making it cost-effective.

  • CAN (Controller Area Network): A robust, multi-master protocol commonly used for safety-critical applications like engine management, ABS, and airbag systems. It offers good reliability and error handling.

  • FlexRay: Offers higher bandwidth and deterministic communication, making it suitable for advanced applications like drive-by-wire and advanced driver-assistance systems (ADAS). It provides both synchronous and asynchronous communication capabilities.

  • MOST (Media Oriented Systems Transport): Primarily used for multimedia and infotainment systems in vehicles. It’s designed for high-bandwidth data transfer, supporting audio, video, and other multimedia content.