TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

CAN vs other network infrastructure

Discussion in 'Off Topic' started by apacheguy, Jan 11, 2016.

  1. apacheguy

    apacheguy Sig 255, VIN 320

    Joined:
    Oct 21, 2012
    Messages:
    3,702
    Location:
    So Cal
    #1 apacheguy, Jan 11, 2016
    Last edited: Jan 11, 2016
    Edit: protocol rather than infrastructure is what I meant

    Been reading lots on what CAN means and what it does in our cars. Not sure I understand why it's the industry standard, tho. What are the primary advantages of a CAN bus over connecting car components to a simple Ethernet hub and operate over TCP/IP?

    I understand that all components on a single bus are addressed together. In other words, every component on the bus sees the same message that is broadcast, but only specific components respond to a CAN ID. Ok, so that's a little different than TCP/IP, where you have individually addressable nodes, but I'm not sure I see how that's an advantage.
     
  2. Oba

    Oba Member

    Joined:
    Jun 7, 2015
    Messages:
    234
    Location:
    SoCal
    CAN existed long before internet... plus, for emissions, it's written in law.
     
  3. apacheguy

    apacheguy Sig 255, VIN 320

    Joined:
    Oct 21, 2012
    Messages:
    3,702
    Location:
    So Cal
    Right. So no real advantage other than it predates other comms protocols? Tesla could in theory ditch CAN as they are not legally bound by emissions regs I suppose.
     
  4. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

    Joined:
    Jun 21, 2012
    Messages:
    7,019
    Could, in theory - the challenge is that Tesla would end up having to redesign many subsystems in the car with other vendors. There are a lot of supplier parts in the car developed by others - they'd have to find replacements speaking IP who could deliver to their quantities. Since the automotive industry adopted CAN, there's an amazing amount of inertia there, and they'd likely have to go with a lot of small, new suppliers willing to build the stuff specifically for them.
     

Share This Page