Star Lan Mathematical Modeling Of Integrated Services

In the past twenty years, computer network was booming. Now, a brand-new era begins, that is, the era of ATM switching networks and B-ISDN, which integrated various services such as data, voice and video. The purpose of this research is to introduce the integrated services into star local area network (LAN).Multi-Star LAN's working principle and design construction have been reported. On this condition, as a new access mode in star LAN, the contention-collision elimination access mode (abbreviated as CCEAM) has been presented. According to customers how to ask for service and how to be served, the system model of CCEAM can be classified six types, and the studies about I st, II nd, IIIrd and Vth system models have also been finished. In this paper, on the basis of previous research works, the IVth system model is studied, and results are compared with the II th one, and we get expressions for the transfer probability of the customers Pij, the mean number of customers in the steadystate M, and the mean detained time of the customers in the system W. So far, the theory foundation of the contention-collision elimination access mode has been established for its application.