Am Implementation Of Orwell Model Simplifications For Network Level Simulation

Abstract

Rings form one of the three basic types of L.A.N. topology (the others being star and bus) and three basic types of protocol have been developed for use with them. By far the most popular of these are token based protocols, whereby the node holding a token is given exclusive access to the ring. Register insertion is another alternative; messages can be inserted onto the ring, delaying any existing traffic by passing it through a shift register. The third, but nowadays less favoured, approach is to use a slotted ring protocol: the ring is divided into slots which circulate around the ring; a node wishing to transmit a message waits until an unfilled slot is found, changes the header and transmits the message in the body of the slot