Carring´s medium access methods in comparison to FDDI

Carring is a cost-effective, reliable, real-time local area network for cars that is based on a ring topology. Applications of Carring are mechatronic systems in cars, but it is also applicable to general LANs. This paper introduces different medium access methods for Carring. Carring applies synchronous time slots for medium access together with an extension algorithm that allows reallocating unused time slots, thus achieving maximum bandwidth utilization of the ring. Another way of efficient bandwidth allocation in Carring deals with the usage of release algorithms. Furthermore, the fibre distributed data interface (FDDI) is described in order to compare it with Carring.