RELIABILITY-ANALYSIS OF A NATIONAL-BROADCASTING-NETWORK (NBN) SYSTEM

This paper investigates a stochastic model of a dynamic National Broad casting Network (NBN) system. In this model a Central Relay Station (C RS) is connected with n-Remote Relay Stations (RRSs). Each of them has an equal frequency of relaying the national programmes. An RRS may fa il temporarily due to irregular power supply, disturbed antenna direct ion etc. Either the CRS or all the RRSs may fail permanently due to co mmon cause failure, i.e., electromagnetic interference. Periodic preve ntive maintenance (PM) of the system is essential for regular operatio n of the network. To detect these kinds of faults, a detection cell is also available. The regenerative point technique is applied for the a nalysis of such a network system.