Load regulation schemes for the intelligent network

This paper studies an efficient load regulation scheme for the French Intelligent Network, where an intelligent node called Point de Commande des Services or 'PCS' is able to centralize service logic and service data. The PCS, of limited capacity is accessed by exchanges (Commutateur d'Acces aux Services or CAS) via the SS7 network. The unavoidable collapsing effects appear as soon as this capacity is exceeded. Two variants of a regulation algorithm are proposed and their performances are presented. Both are shown to behave satisfactorily, with a slight advantage to the so-called 'Random Admittance' scheme. The comparison uses non-stationary input and non-Poisson traffics, since these situations will be quite common in case of overload.