Network Design: Notes

Model year 2007

Fig 1: Identifying MOST Network

Courtesy of VOLVO CARS CORPORATION

Model year 2008 (up to and incl. structure week 200745)

Fig 2: Identifying MOST Network

Courtesy of VOLVO CARS CORPORATION

Model year 2008 (from and incl. structure week 200746)

Fig 3: Identifying MOST Network

Courtesy of VOLVO CARS CORPORATION

The MOST network is an optical network where all control modules are connected in a ring.

All messages on the MOST network travel in the same direction from the Infotainment control module (ICM) to the Remote Digital Audio Receiver (RDAR).

In a fiber optic network, light pulses are transmitted instead of electrical signals. The light pulses are interpreted in the same way as the electrical signals on the CAN network.

The MOST network uses the master-slave concept. This means that a master control module, infotainment control module (ICM) has overall control of communication on the MOST network.

The fiber optic cable is made of plastic. Communication is using red light on a wavelength of 650 nm.