Performance study of a tree LAN with collision avoidance

The design is presented of a broadcast star network that uses a collision-avoidance switch. This network combines the benefits of random access (low delay when traffic is light; simple, distributed, and therefore robust protocols) with excellent network utilization. Performance analyses of a slotted broadcast star network are then presented to obtain distributions of the transmission delay: an exact analysis for a network with an infinite number of stations, and an approximate analysis for a network with a finite number of stations