Data challenges and solutions

The zone topology needs a new and bigger focus on networking; thus, high-bandwidth interfaces such as Peripheral Component Interconnect Express (PCIe), CAN XL and gigabit Ethernet are gaining momentum. The right physical layer (PHY) can address the bandwidth requirements.

Figure 7 is a block diagram of a typical zonal module that includes high-speed communication links. For the different throughput needs, and to provide bandwidth for a combination of traffic between the zonal module and central computing, gigabit Ethernet, and potentially PCIe or CAN XL, could be vital. In several cases, deploying PCIe retimer or redriver devices for long-distance cable connections can be advantages. CAN XL can provide compatibility with existing CAN networks while offering up to 20Mbps speeds without the need for more complex networking software. For zonal module connections to and from sensors and actuators, there might be a contrasting need for even lower-bandwidth – and thus cheaper – bus systems such as LIN. Common to all is the provision of a standardized bus with standardized software control to employ a complete service- and software-based approach.

For all links to be future-proof, the network topology secures spare bandwidth, especially between the zonal module and central computing, to enable software upgrades while maintaining existing and already validated hardware.