Fault tolerance increasing in token ring LANs

The authors analyze error-recovery mechanisms in local area networks (LANs) with token-ring access with particular reference to the problem of ring failure, i.e. (breaks in the ring or transmitter and/or receiver failure). They also suggest solutions to increase fault tolerance. The solutions suggested concern both the architecture (topology) and the access protocol (medium access control). In particular, a process capable of performing automatic network reconfiguration is proposed. The process is first described functionally and then specified through the finite-state machine